CSC485-A2/twosub.pl at master · davidatuken/CSC485-A2 · GitHub

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:- ale_flag(subtypecover,_,off).
:- discontiguous sub/2,intro/2.

bot sub [mood, tense, sem, cat, pos, verbal, nominal].

	% parts of speech
    pos sub [n,p,v,det,toinf].
		toinf sub [].	% infinitival to
        n sub [].
        v sub [].
        p sub [].
        det sub [].

    % phrasal categories
    cat sub [vproj,np].
        vproj sub [inf_clause,s,vp] intro [mood:mood].
			s intro [mood:indicative].
            inf_clause intro [mood:infinitive].
			vp intro [mood:indicative].
		np sub [].

        verbal sub [v,vproj] intro [vsem:v_sem].
        nominal sub [n,np] intro [nsem:n_sem].

	% mood and tense for verbs
	tense sub [past, present].
		past sub [].
		present sub [].
        mood sub [indicative,infinitive].
            indicative intro [tense:tense].
            infinitive sub [].

	% semantics for verbs and nouns
	sem sub [v_sem, n_sem].

        % only add features for v_sem and its subtypes

		% semantics for verbs
		v_sem sub [prefer, persuade, promise, expect, sleep]
                intro [].   % This should not be empty!  Fill in features for this and
                                  %  the following subtypes:
			prefer sub [].
			persuade sub [].
			promise sub [].
			expect sub [].
			sleep sub [].

		% semantics for nouns
		n_sem sub [student, teacher].
			student sub [].
			teacher sub [].