(S (S (BASENP (DT The) (NNS shootings)) (VP (VP (VBD occurred) (PP (IN inside) (BASENP (DT a) (NN mosque)))) (PP (IN during) (NP (BASENP (DT a) (NNP U.S.) (NN offensive)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBD led) (PP (TO to) (NP (BASENP (JJ house-to-house) (NN fighting)) (PP (IN in) (BASENP (JJ southern) (NNP Falluja)))))) (BASENP (JJ last) (NNP November))))))))) (PERIOD .))