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Example 2 Tom read a book. (Chomsky 2015:10)
Initial Stream: ['book', 'n_3rd_sg', 'a', 'read', 'v*', ['n_3rd_sg', 'Tom'], 'Tpast', 'C']

Successful Derivation 1


Merge 1
Merge: set-Merge
Stream: ['a', 'read', 'v*', ['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Unlabeled:


Merge 2
Merge: pair-Merge
Stream: ['read', 'v*', ['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Label stays
the same:



Merge 3
Merge: set-Merge
Stream: ['v*', ['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Unlabeled:


Merge 4
Merge: set-Merge
Stream: [['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Operations: Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:


Substream
Stream: ['Tom', 'n_3rd_sg']

Merge 5
Merge: set-Merge
Stream: []
Unlabeled:

Main Stream


Merge 6
Merge: set-Merge
Stream: [['Tom', 'n_3rd_sg'], 'Tpast', 'C']
Unlabeled:


Merge 7
Merge: set-Merge
Stream: ['C']
Operations: Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 8
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #2
Continued from Merge 7

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


Merge 10
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label via
shared features:

Label from
Head:

Label from
Head:

FormCopy:
Label via
movement:

Transfer:
Frontier:

Spell Out: C n Tom T(Past,3rd,sg) v* read a n book
PF Rules: Tom T(Past,3rd,sg)+read
Tom read a book

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

Merge 11
Merge: set-Merge
Stream: ['v*', ['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Unlabeled:


Merge 12
Merge: set-Merge
Stream: [['n_3rd_sg', 'Tom'], 'Tpast', 'C']
Operations: Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

Label from
Head:

FormCopy:
Crash (Unlabeled):

# of Backtracks: 2
# of Crashes: 2
# of Successful Derivations: 1

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