(S (S (NP (BASENP (JJ 77-year-old) (JJ local) (NN resident) (NNP Chen) (NNP Xiaohong)) (PRN (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBZ lives) (PP (BASENP (NN 50) (NNS metres)) (PP (IN from) (BASENP (NN ground) (NN zero))))))) (COMMA ,))) (VP (VP (VBD described) (BASENP (DT the) (NN explosion))) (COLON :) (QTL (DQL ``) (S (BASENP (PRP I)) (VP (VBD was) (VP (VBG watching) (S (BASENP (PRPD my) (NN grandson)) (VP (VBG finishing) (BASENP (PRPD his) (NNS lessons)))))))))) (PERIOD .))