(S (S (S (NP (BASENP (JJ Many) (NNS trees)) (PRN (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (ADVP (RB still)) (VP (VBP have) (BASENP (PRPD their) (NNS leaves)))))) (COMMA ,))) (VP (VBP have) (VP (VBN broken) (PP (IN into) (BASENP (NNS pieces)))))) (SBAR (IN as) (S (NP (DT the) (NP (ADJP (JJ heavy) (COMMA ,) (JJ wet)) (NN snow))) (VP (VBD began) (S (VP (TO to) (VP (VP (VB pile) (PRT (RP up))) (COMMA ,) (NP (NP (QP (ADJP (ADJP (RB as) (JJ much)) (IN as)) (DT an)) (NN inch)) (BASENP (DT an) (NN hour)))))))))) (PERIOD .))