;;; parse node labels

S-sg := [ CATEG S,
          NUMAGR sg ].

S-pl := [ CATEG S,
          NUMAGR pl ].

S := [ CATEG S ].

NP-sg := [ CATEG NP,
           NUMAGR sg ]. 

NP-pl := [ CATEG NP,
           NUMAGR pl ].

NP := [ CATEG NP ].

VP-sg := [ CATEG VP,
           NUMAGR sg ].

VP-pl := [ CATEG VP,
           NUMAGR pl ].

VP := [ CATEG VP ].

Det-sg := [ CATEG Det,
            NUMAGR sg ].

Det-pl := [ CATEG Det,
            NUMAGR pl ].

Det := [ CATEG Det ].

N-sg := [ CATEG N,
          NUMAGR sg ].

N-pl := [ CATEG N,
          NUMAGR pl ].

N := [ CATEG N ].