(S (S (PP (IN Along) (PP (IN with) (BASENP (DT the) (NN ash) (NN cloud)))) (COMMA ,) (S (NP (NP (BASENP (DT a) (JJ large) (NN amount)) (PP (IN of) (BASENP (JJ hot) (NNS rocks)))) (PRN (LRB -LRB-) (NP (BASENP (NN some)) (VP (VBG reaching) (NP (BASENP (NN three) (NNS feet)) (PP (IN in) (BASENP (NN diameter)))))) (RRB -RRB-))) (VP (VP (VBZ flew) (PP (IN on) (BASENP (DT all) (NNS directions)))) (COMMA ,) (S (VP (VBG damaging) (NP (NP (BASENP (NNS roads)) (COMMA ,) (BASENP (NNS homes))) (CC and) (BASENP (NN vegetation)))))))) (PERIOD .))