( ( ( ( ( ( In fact ) ( , ( humans ( can ( live ( without ( food ( for ( a month ) ) ) ) ) ) ) ) ) , ) but ) ( ( without water ) ( , ( we ( ( can not ) ( survive ( ( more ( ( than a ) few ) ) days ) ) ) ) ) ) ) . )
(ROOT (S (S (PP (IN In) (NP (NN fact))) (, ,) (NP (NNS humans)) (VP (MD can) (VP (VB live) (PP (IN without) (NP (NP (NN food)) (PP (IN for) (NP (DT a) (NN month)))))))) (, ,) (CC but) (S (PP (IN without) (NP (NN water))) (, ,) (NP (PRP we)) (VP (MD can) (RB not) (VP (VB survive) (NP (QP (JJR more) (IN than) (DT a) (JJ few)) (NNS days))))) (. .)))
In fact, humans can live without food for a month, but without water, we cannot survive more than a few days.
(ROOT (S (NP (JJS Most) (NNS people)) (VP (MD can) (VP (VB survive) (NP (QP (RB only) (DT a) (JJ few)) (NNS days)) (PP (IN without) (NP (NN water))))) (. .)))