kylelovesllms/grammar-number-agreement-frames

Grammar V1 + Number Agreement — Depth-1 Syntactic Frames

All syntactic frames with at most one relative clause generated by the paired Head Initial / Head Final CFG with subject-verb number agreement of the translation-syntax project (experiments/01_grammar_v1/src/cfg/grammar_number_agreement.py). The grammar is Grammar V1 with a number feature (_sg / _pl) on nouns, verbs and the phrases that carry their number: the matrix verb agrees with the matrix subject, a subject-gap RC verb with the head noun, an object-gap RC verb with the embedded subject; objects take either number. Frames are category-level skeletons to be populated with lexical items; terminals carry their 1-based HI linear position (e.g. [N_pl_1]), so HF frames show where each HI slot moved.

212 frames (60 ambiguous / in distribution, 152 unambiguous / out of distribution; each of the 40 V1 frames in 2^(number of nouns) number variants), each expanded into a copy row (HF Frame = HI Frame, the copy target) and a translate row (HF Frame = hierarchical translation), giving 424 rows in frames.csv.

is_ambiguous is True iff the linear reversal rule (keep the first token, reverse the rest) matches the hierarchical translation. Matrix Number is the number of the matrix subject, RC Number that of the noun the RC verb agrees with (None without an RC), and n_attractors counts nouns of the other number between a verb and the noun it agrees with (only center-embedded frames have any).

Counts per Category (frames, before task expansion)

Attachment Site	Gap Type	Frames	Ambiguous	Unambiguous
None	None	12	12	0
Subject	Subject Gap	72	0	72
Subject	Object Gap	48	0	48
Object	Subject Gap	48	48	0
Object	Object Gap	32	0	32
Total		212	60	152

Agreement per Category

Attachment Site	Gap Type	Frames	RC number = matrix number	RC number differs	With attractor
None	None	12	0	0	0
Subject	Subject Gap	72	72	0	24
Subject	Object Gap	48	24	24	24
Object	Subject Gap	48	24	24	0
Object	Object Gap	32	16	16	0
Total		212			48