(S (S (PP (IN On) (BASENP (NNP September) (NN 7))) (COMMA ,) (S (BASENP (JJ Syrian) (NN fighter) (NNS planes)) (VP (VBD fired) (PP (IN upon) (NP (BASENP (JJ Israeli) (NNS jets)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (VP (ADVP (RB allegedly)) (VP (QT (DQL ``) (VP (VBG dropping) (BASENP (NN ammunition))) (DQR '')) (PP (IN in) (NP (BASENP (DT the) (JJ northeastern) (NN part)) (PP (IN of) (BASENP (NNP Syria))))))))))))))) (PERIOD .))