( ( A pulley ) ( ( is ( ( ( a type ) ( of ( simple machine ) ) ) ( that ( ( uses ( a wheel ) ) ( with ( ( a groove ) ( in ( ( it and ) ( a rope ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN pulley)) (VP (VBZ is) (NP (NP (DT a) (NN type)) (PP (IN of) (NP (JJ simple) (NN machine))) (SBAR (WHNP (WDT that)) (S (VP (VBZ uses) (NP (DT a) (NN wheel)) (PP (IN with) (NP (NP (DT a) (NN groove)) (PP (IN in) (NP (NP (PRP it)) (CC and) (NP (DT a) (NN rope))))))))))) (. .)))
A pulley is a type of simple machine that uses a wheel with a groove in it and a rope.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types) (NNS types)) (PP (IN of) (NP (JJ simple) (NNS machines))))) (. .)))