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Example 3 Several prizes are likely to be awarded. (Chomsky 2001:7)
Initial Stream: ['prize', 'n_pl_3rd', 'several', 'award', 'v', 'Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']

Successful Derivation 1


Merge 1
Merge: set-Merge
Stream: ['several', 'award', 'v', 'Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 2
Merge: pair-Merge
Stream: ['award', 'v', 'Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Label stays
the same:



Merge 3
Merge: set-Merge
Stream: ['v', 'Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 4
Merge: set-Merge
Stream: ['Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 5
Merge: set-Merge
Stream: ['toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (Psv,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 6
Merge: set-Merge
Stream: ['likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (toT,Psv)
Checked Features: 'uPerson'
Unlabeled:


Merge 7
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 8
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 9
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 10
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,Psv)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 11
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
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Label from
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Label from
Head:

Label from
Head:

Crash (No Case):

   ➔

Backtrack (check for another possible derivation: Free Merge): Attempt: #2
Continued from Merge 10

Merge 12
Merge: set-Merge
Stream: ['C']
FormCopy:
Unlabeled:


Merge 13
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label via
shared features:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
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Label from
Head:

Label from
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Label from
Head:

Label from
Head:

Transfer:
Frontier:

Terminals: C several n prize T(Pres,3rd,pl) v adj likely toT be -en v award
Externalization
Rules:
several prizes T(Pres,3rd,pl)+v
several prizes are likely to be -en+award
several prizes are likely to be awarded

Successful Derivation 1
Top

Backtrack (check for another possible derivation: Free Merge): Attempt: #3
Continued from Merge 9

Merge 14
Merge: set-Merge
Stream: ['Tpres', 'C']
FormCopy:
Unlabeled:


Merge 15
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 16
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #4
Continued from Merge 8

Merge 17
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 18
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 19
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 20
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #5
Continued from Merge 7

Merge 21
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 22
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 23
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 24
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 25
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #6
Continued from Merge 6

Merge 26
Merge: set-Merge
Stream: ['likely', 'adj', 'v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 27
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 28
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 29
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 30
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 31
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label via
shared Person:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (No Case):

   ➔

Backtrack (check for another possible derivation: Free Merge): Attempt: #7
Continued from Merge 5

Merge 32
Merge: set-Merge
Stream: ['toT', 'likely', 'adj', 'v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 33
Merge: set-Merge
Stream: ['likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (toT,n)
Checked Features: 'uPerson'
Unlabeled:


Merge 34
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 35
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 36
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 37
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 38
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label via
shared features:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (No Case):

   ➔

Backtrack (check for another possible derivation: Free Merge): Attempt: #8
Continued from Merge 4

Merge 39
Merge: set-Merge
Stream: ['Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 40
Merge: set-Merge
Stream: ['toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (Psv,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 41
Merge: set-Merge
Stream: ['likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (toT,Psv)
Checked Features: 'uPerson'
Unlabeled:


Merge 42
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 43
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 44
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 45
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,Psv)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 46
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #9
Continued from Merge 3

Merge 47
Merge: set-Merge
Stream: ['v', 'Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
FormCopy:
Unlabeled:


Merge 48
Merge: set-Merge
Stream: ['Psv', 'toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 49
Merge: set-Merge
Stream: ['toT', 'likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (Psv,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 50
Merge: set-Merge
Stream: ['likely', 'adj', 'v', 'Tpres', 'C']
Operations: Agree: (toT,Psv)
Checked Features: 'uPerson'
Unlabeled:


Merge 51
Merge: set-Merge
Stream: ['adj', 'v', 'Tpres', 'C']
Unlabeled:


Merge 52
Merge: set-Merge
Stream: ['v', 'Tpres', 'C']
Unlabeled:


Merge 53
Merge: set-Merge
Stream: ['Tpres', 'C']
Unlabeled:


Merge 54
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpres,Psv)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 55
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

# of Backtracks: 8
# of Crashes: 8
# of Successful Derivations: 1

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