( Water ( ( to ( keep ( soil moist ) ) ) . ) )
(ROOT (S (NP (NNP Water)) (VP (TO to) (VP (VB keep) (NP (NN soil) (NN moist)))) (. .)))
Water to keep soil moist.
(ROOT (S (NP (NNP Water) (NNS molds)) (ADVP (RB mostly)) (VP (VBP live) (PP (IN in) (NP (NN water) (CC or) (NN moist) (NN soil)))) (. .)))