( ( Water ( ( the tree ) ( in ( ( periods ( of ( drought lasting ) ) ) ( 2 weeks ) ) ) ) ) . )
(ROOT (NP (NP (NNP Water)) (NP (NP (DT the) (NN tree)) (PP (IN in) (NP (NP (NNS periods)) (PP (IN of) (NP (NN drought) (NNS lasting))) (NP (CD 2) (NNS weeks))))) (. .)))
Water the tree in periods of drought lasting 2 weeks.
(ROOT (S (SBAR (IN Because) (S (NP (NNS trees)) (VP (VBP add) (NP (NN water) (NN vapor)) (PP (TO to) (NP (NN air)))))) (, ,) (S (VP (VBG cutting) (PRT (RP down)) (NP (NNS forests)))) (VP (VBZ leads) (PP (TO to) (NP (NP (JJR longer) (NNS periods)) (PP (IN of) (NP (NN drought)))))) (. .)))