( It ( ( drives ( ( a belt ) ( that ( turns ( ( a driveshaft ) ( of ( threaded rod ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ drives) (NP (NP (DT a) (NN belt)) (SBAR (WHNP (WDT that)) (S (VP (VBZ turns) (NP (NP (DT a) (NN driveshaft)) (PP (IN of) (NP (JJ threaded) (NN rod))))))))) (. .)))
It drives a belt that turns a driveshaft of threaded rod.
(ROOT (S (NP (DT The) (NN turning) (NN driveshaft)) (VP (VBZ causes) (NP (NP (DT the) (NNS wheels)) (PP (IN of) (NP (DT the) (NN car) (S (VP (TO to) (VP (VB turn)))))))) (. .)))
The turning driveshaft causes the wheels of the car to turn.