( Archimedes ( ( discovered ( ( the laws ) ( of ( ( ( the lever ) and ) ( the pulley ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Archimedes)) (VP (VBD discovered) (NP (NP (DT the) (NNS laws)) (PP (IN of) (NP (NP (DT the) (NN lever)) (CC and) (NP (DT the) (NN pulley)))))) (. .)))
Archimedes discovered the laws of the lever and the pulley.
(ROOT (S (NP (NP (NNP Archimedes) (POS ')) (NN law)) (VP (VBZ explains) (SBAR (WHADVP (WRB why)) (S (NP (NP (DT a) (NN ship)) (VP (VBG weighing) (NP (NP (NNS thousands)) (PP (IN of) (NP (JJ metric) (NNS tons)))))) (VP (VBZ floats) (PP (IN on) (NP (NN water))))))) (. .)))