(S (S (S (BASENP (NNP Etienne)) (VP (VBD had) (VP (VBN been) (VP (VBG studying) (PP (IN at) (NP (BASENP (NN school)) (PP (IN in) (BASENP (DT the) (NN capital))))))))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT the) (NNS tremors)) (VP (VBD started) (COMMA ,) (S (VP (VBG collapsing) (BASENP (DT the) (NN building)))))))) (PERIOD .))