But there's plenty more.
( But ( there ( ( ( 's plenty ) more ) . ) ) )
(ROOT (S (CC But) (NP (EX there)) (VP (VBZ 's) (ADVP (RB plenty)) (ADJP (JJR more))) (. .)))
It looks like we're running low, but there's plenty more in the next room. 
( ( ( ( ( It ( looks ( like ( we ( 're ( running low ) ) ) ) ) ) , ) but ) ( there ( ( 's plenty ) ( more ( in ( the ( next room ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ looks) (SBAR (IN like) (S (NP (PRP we)) (VP (VBP 're) (VP (VBG running) (ADJP (JJ low)))))))) (, ,) (CC but) (S (NP (EX there)) (VP (VBZ 's) (ADVP (RB plenty)) (ADJP (ADJP (JJR more)) (PP (IN in) (NP (DT the) (JJ next) (NN room)))))) (. .)))