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Example 5 Susan was late for dinner.
Initial Stream: ['Susan', 'n_3rd_fem_sg', 'late', 'adj', ['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']

Successful Derivation 1


Merge 1
Merge: set-Merge
Stream: ['late', 'adj', ['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
Unlabeled:


Merge 2
Merge: set-Merge
Stream: ['adj', ['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
Unlabeled:


Merge 3
Merge: set-Merge
Stream: [['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
Unlabeled:

Substream
Stream: ['dinner', 'n_3rd_sg', 'P_for']

Merge 4
Merge: set-Merge
Stream: ['P_for']
Unlabeled:


Merge 5
Merge: set-Merge
Stream: []
Operations: Agree: (for,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:


Main Stream


Merge 6
Merge: pair-Merge
Stream: ['be', 'v', 'Tpast', 'C']


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


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


Merge 9
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpast,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 10
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:

Crash (No Case):

   ➔

Backtrack (check for another possible derivation: Free Merge): Attempt: #2
Continued from Merge 9

Merge 11
Merge: set-Merge
Stream: ['C']
FormCopy:
Unlabeled:


Merge 12
Merge: set-Merge
Stream: []
Unlabeled:
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:

Label from
Head:

Transfer:
Frontier:

Terminals: C n Susan T(Past,3rd,sg) v be adj late for n dinner
Externalization
Rules:
Susan T(Past,3rd,sg)+v
Susan was late for dinner

Successful Derivation 1
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Backtrack (check for another possible derivation: Free Merge): Attempt: #3
Continued from Merge 8

Merge 13
Merge: set-Merge
Stream: ['Tpast', 'C']
FormCopy:
Unlabeled:


Merge 14
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpast,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 15
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:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #4
Continued from Merge 7

Merge 16
Merge: set-Merge
Stream: ['v', 'Tpast', 'C']
FormCopy:
Unlabeled:


Merge 17
Merge: set-Merge
Stream: ['Tpast', 'C']
Unlabeled:


Merge 18
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpast,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 19
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:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #5
Continued from Merge 3

Merge 20
Merge: set-Merge
Stream: [['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
FormCopy:
Unlabeled:

Substream
Stream: ['dinner', 'n_3rd_sg', 'P_for']

Merge 21
Merge: set-Merge
Stream: ['P_for']
Unlabeled:


Merge 22
Merge: set-Merge
Stream: []
Operations: Agree: (for,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:


Main Stream


Merge 23
Merge: pair-Merge
Stream: ['be', 'v', 'Tpast', 'C']


Merge 24
Merge: set-Merge
Stream: ['v', 'Tpast', 'C']
Unlabeled:


Merge 25
Merge: set-Merge
Stream: ['Tpast', 'C']
Unlabeled:


Merge 26
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpast,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 27
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:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #6
Continued from Merge 2

Merge 28
Merge: set-Merge
Stream: ['adj', ['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
FormCopy:
Unlabeled:


Merge 29
Merge: set-Merge
Stream: [['P_for', 'n_3rd_sg', 'dinner'], 'be', 'v', 'Tpast', 'C']
Unlabeled:

Substream
Stream: ['dinner', 'n_3rd_sg', 'P_for']

Merge 30
Merge: set-Merge
Stream: ['P_for']
Unlabeled:


Merge 31
Merge: set-Merge
Stream: []
Operations: Agree: (for,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:


Main Stream


Merge 32
Merge: pair-Merge
Stream: ['be', 'v', 'Tpast', 'C']


Merge 33
Merge: set-Merge
Stream: ['v', 'Tpast', 'C']
Unlabeled:


Merge 34
Merge: set-Merge
Stream: ['Tpast', 'C']
Unlabeled:


Merge 35
Merge: set-Merge
Stream: ['C']
Operations: Agree: (Tpast,n)
Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 36
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:

Crash (Unlabeled):

# of Backtracks: 5
# of Crashes: 5
# of Successful Derivations: 1

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