( Yet ( both ( ( are ( Drought ( Period forests ) ) ) . ) ) )
(ROOT (S (CC Yet) (NP (DT both)) (VP (VBP are) (NP (JJ Drought) (NN Period) (NNS forests))) (. .)))
Yet both are Drought Period forests.
(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)))))) (. .)))