(S (S (S (BASENP (PRP They)) (VP (VP (VBD returned) (BASENP (NN fire))) (COMMA ,) (S (VP (VBG firing) (NP (BASENP (QP (RB nearly) (NN 80)) (NNS rounds)) (PP (IN of) (BASENP (NN artillery)))))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (DT no) (NN damage)) (VP (VBD was) (VP (VBN reported) (PP (IN on) (BASENP (DT the) (JJ North) (JJ Korean) (NN side))))))) (PERIOD .))