(S (S (PP (PP (NP (S-REL (PP (NP (PP (BASENP (DT この) (NN 午後)) (IN より)) (NN 前)) (IN に)) (S-NSBJ-NOBJ (VP (VBV 行っ) (VP (MD た))))) (NN 測量)) (IN で)) (IN は)) (S (PP-SBJ (BASENP (NN それ)) (IN が)) (VP (SBAR (S-NSBJ (ADJP (NN 安全) (MD だ))) (INQT と)) (VP (VP (VP (VP (NN 判断) (VBO さ)) (VP (VBV れ))) (INTE て)) (VP (VBV い) (VP (MD た))))))) (PERIOD 。))
この 午後 より 前 に 行っ た 測量 で は それ が 安全 だ と 判断 さ れ て い た 。
Earlier that afternoon , measurements had been taken to determine its stability .