(S (S (PP (IN In) (BASENP (NNP Baghdad))) (S (BASENP (DT a) (JJ mid-morning) (NN blast)) (VP (VP (VBD injured) (BASENP (QP (RB about) (DT a) (NN dozen)) (NNS people))) (CONJP (COMMA ,) (CC and)) (VP (VBG killing) (NP (QP (ADVP (IN at) (JJS least)) (NN eight)) (BASENP (NN police) (NNS officers))))))) (PERIOD .))