code$ swipl -s code_English.prolog

% Janus 1.5.2 embeds Python 3.13.13 (main, Apr  8 2026, 18:23:14) [Clang 21.0.0 (clang-2100.0.123.102)]

Manual & tutorial: https://sandiway.arizona.edu Sandiway Fong (2024-2026)

Run: ?- parse(List,SO,L). (; for more answers)

  List = [..words] (input), SO,L = syntactic object, [..] spellout (output)

See derivation: ?- report. ?- graph. (<- after parse/3) ?- summary. (short) 

  for a long report ?- retract(no_fill).

LEX expansion: ⒜ WordNet: ?- useMorphy. (noMorphy) 

  assert/retract/?- : use_morphy(C), for C={v,n,a,r}. ⒝ edit lex.prolog

  ⒞ ?- addNoun(Word) (addTr/addUrg/addUnacc/addAdj/addPrep).

Welcome to SWI-Prolog (threaded, 64 bits, version 10.0.2)

SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software.

Please run ?- license. for legal details.

For online help and background, visit https://www.swi-prolog.org

For built-in help, use ?- help(Topic). or ?- apropos(Word).

% Interactive session; added `.` to Python `sys.path`

101 ?- assert(vR(be, v:be:θ, θ)).

true.

102 ?- parse([they,are,planes],S,L).

Words: they are planes 

Initial WS: planes  be_θ  v_be:θ:pres  INFL_v:pl  they  

INT/EXT: {C, {INFL_v:pl, {they, {v_be:θ:pres, {be_θ, planes}}}}}

EXT: they 3pl pres be planes 

Spellout: they are planes 

Parse found! 

S = {C, {INFL_v:pl, {they, {v_be:θ:pres, {be_θ, planes}}}}},

L = [they,are,planes] ;

INT/EXT: {C, {INFL_v:pl, {planes, {v_be:θ:pres, {be_θ, they}}}}}

Error: Case: object "they" not ACC

INT/EXT: {C, {INFL_v:pl, {{planes, they}, {v_be:θ:pres, {be_θ, {planes, they}}}}}}

EXT: {planes,[and],they} 3pl pres be {planes,[and],they} 

Blocked: EXT inconsistent!

Blocked: inconsistent with input!

false.

104 ?- report.

REPORT LENGTH: 30

true.