(S (S (ADVP (RB Midway) (PP (IN through) (BASENP (DT the) (NN dogfight)))) (S (NP (BASENP (NN one)) (PP (IN of) (BASENP (DT the) (NNS planes)))) (VP (PRN (COMMA ,) (S (BASENP (PRP I)) (VP (VP (VBP 'm) (RB not)) (ADJP (JJ sure) (SBAR (WHNP (WDT which) (NN one)))))) (COMMA ,)) (VP (ADVP (RB literally)) (COMMA ,) (VP (VP (VP (VBD turned) (ADVP (RB quite) (RB steeply))) (COMMA ,) (VP (VBD went) (PP (IN into) (BASENP (RB almost) (DT a) (JJ straight) (NN dive))))) (CC and) (VP (VP (VBD ploughed) (PP (IN into) (BASENP (DT a) (NN hill)))) (NP (RB probably) (NP (BASENP (QP (RB about) (DT a)) (NN mile)) (PP (IN from) (BASENP (DT the) (NN airfield))))))))))) (PERIOD .))