(S (S (NP (NP (BASENP (NNS Piles)) (PP (IN of) (BASENP (NN wood)))) (VP (VBN prepared) (ADVP (RB beforehand)))) (VP (VBP are) (NP (BASENP (JJ attractive) (NNS nests)) (PP (IN for) (NP (BASENP (JJ hibernating) (NNS creatures)) (PP (IN like) (NP (BASENP (NNS hedgehogs)) (COMMA ,) (SBAR (WHNP (WDT who)) (S (VP (MD might) (VP (VB burn) (PP (IN in) (BASENP (DT the) (NNS bonfires)))))))))))))) (PERIOD .))