// Sentence: The dog chases the cat
Token("the",0)
Token("dog",1)
Token("chases",2)
Token("the",3)
Token("cat",4)

// Training
Det(0,1)
N(1,2)
V(2,3)
Det(3,4)
N(4,5)

S(0,5)
NP(0,2)
VP(2,5)
NP(3,5)

Succ(1,0)
Succ(2,1)
Succ(3,2)
Succ(4,3)
Succ(5,4)