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}
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[[NewCompileError]]