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Example 5 Bill asked what Mary bought./*Bill asked what did/that Mary buy. (Pesetsky & Torrego 2001:378)
Initial Stream: ['what', 'n_sg_3rd_wh', 'buy', 'v*', ['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']

Successful Derivation 1


Merge 1
Merge: set-Merge
Stream: ['buy', 'v*', ['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:
Box:


Merge 2
Merge: set-Merge
Stream: ['v*', ['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:


Merge 3
Merge: set-Merge
Stream: [['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Operations: Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:


Substream
Stream: ['Mary', 'n_sg_3rd']

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

Main Stream


Merge 5
Merge: set-Merge
Stream: [['Mary', 'n_sg_3rd'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:


Merge 6
Merge: set-Merge
Stream: ['C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Operations: Checked Features: 'uPerson' 'uNumber' 'uGender'
Unlabeled:


Merge 7
Merge: set-Merge
Stream: ['ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:
Label from
Head:

Label from
Head:

Label from
Head:

FormCopy:
Access Box: what+C_Q
Crash (Unlabeled):

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

Merge 8
Merge: set-Merge
Stream: ['ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:


Merge 9
Merge: set-Merge
Stream: ['ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:
Label from
Head:

Label from
Head:

Label via
shared features:

Label from
Head:

Label from
Head:

FormCopy:
Label via
movement:

FormCopy:
Access Box: what+C_Q


Merge 10
Merge: set-Merge
Stream: ['v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:


Merge 11
Merge: set-Merge
Stream: [['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:

Substream
Stream: ['Bill', 'n_sg_3rd']

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

Main Stream


Merge 13
Merge: set-Merge
Stream: [['Bill', 'n_sg_3rd'], 'Tpast', 'C']
Unlabeled:


Merge 14
Merge: set-Merge
Stream: ['C']
Operations: 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:

Crash (Unlabeled):

Backtrack (check for another possible derivation: Free Merge): Attempt: #3
Continued from Merge 14

Merge 16
Merge: set-Merge
Stream: ['C']
Unlabeled:


Merge 17
Merge: set-Merge
Stream: []
Unlabeled:
Label from
Head:

Label from
Head:

Label via
shared features:

Label from
Head:

Label from
Head:

FormCopy:
Label from
Head:

Label via
movement:

Label from
Head:

Transfer:
Frontier:

Spell Out: C n Bill T(Past,3rd,sg) v ask what+CQ n Mary T(Past,3rd,sg) v* buy
PF Rules: Bill T(Past,3rd,sg)+ask
Bill asked what Mary T(Past,3rd,sg)+buy
Bill asked what Mary bought

Successful Derivation 1
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Backtrack (check for another possible derivation: Free Merge): Attempt: #4
Continued from Merge 2

Merge 18
Merge: set-Merge
Stream: ['v*', ['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], 'Tpast', 'C']
Unlabeled:


Merge 19
Merge: set-Merge
Stream: [['n_sg_3rd', 'Mary'], 'Tpast', 'C_Q', 'ask', 'v', ['n_sg_3rd', 'Bill'], '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: 3
# of Crashes: 3
# of Successful Derivations: 1

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