( ( One ( gear wheel ) ) ( ( can ( be ( turned ( to ( ( cause ( the ( second ( gear wheel ) ) ) ) ( to turn ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD One) (NN gear) (NN wheel)) (VP (MD can) (VP (VB be) (VP (VBN turned) (S (VP (TO to) (VP (VB cause) (NP (DT the) (JJ second) (NN gear) (NN wheel)) (S (VP (TO to) (VP (VB turn)))))))))) (. .)))
One gear wheel can be turned to cause the second gear wheel to turn.
(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.