(S (S (PP (IN In) (BASENP (NN response))) (S (BASENP (DT the) (NNP Mehdi) (NNP Army)) (VP (VP (VP (VBD setup) (BASENP (NNS checkpoints))) (PP (IN in) (NP (BASENP (NNS parts)) (PP (IN of) (BASENP (DT the) (NN city)))))) (COMMA ,) (S (VP (VBG sparking) (NP (BASENP (DT the) (NNS violence)) (SBAR (WHNP (WDT that)) (S (VP (VBD saw) (S (BASENP (DT the) (JJ Iraqi) (NN government)) (VP (VP (VP (VB send) (PRT (RP in))) (NP (BASENP (JJ large) (NNS numbers)) (PP (IN of) (BASENP (NNS reinforcements))))) (S (VP (TO to) (VP (VB re-take) (NP (BASENP (NN control)) (PP (IN of) (BASENP (DT the) (NN city)))))))))))))))))) (PERIOD .))