( Then ( Shuki ( ( ( explained ( to me ) ) ( some ( of ( ( the laws ) ( of ( kemach yashan ) ) ) ) ) ) . ) ) )
(ROOT (S (RB Then) (NP (NNP Shuki)) (VP (VBD explained) (PP (TO to) (NP (PRP me))) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (NNS laws)) (PP (IN of) (NP (JJ kemach) (NN yashan))))))) (. .)))
Then Shuki explained to me some of the laws of kemach yashan.
(ROOT (S (NP (NP (NNP Archimedes) (POS ')) (NN law)) (VP (VBZ explains) (NP (SBAR (WHADVP (WRB why)) (S (NP (DT some) (NNS objects)) (VP (VBP float)))) (CC and) (NP (DT some) (NN sink))))))