More actions
Sentence ::= Subject Verb Object . Subject ::= I | a Noun | the Noun Object ::= me | a Noun | the Noun | ε Noun ::= cat | mat | rat Verb ::= like | is | see | sees | go
FIRST(Sentence) = {I, a, the} FIRST(Subject) = {I, a, the} FIRST(Verb) = {like, is, see, sees, go} FIRST(Object) = {me, a, the, ε} FIRST(Noun) = {cat, mat, rat}