// Sentence: Small dogs chase big cats
Token("small",0)
Token("dogs",1)
Token("chase",2)
Token("big",3)
Token("cats",4)

// Training
Adj(0,1)
N(1,2)
V(2,3)
Adj(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)