(S (S (PP (BASENP (DT この) (NN 急停車)) (IN で)) (COMMA 、) (S (PP (NP (S-REL-NSBJ (VP (PP (NP (PP (NP (PP (BASENP (NN 燃料)) (IN の)) (NNP 残量)) (IN の)) (NN 監視)) (IN に)) (VB 役立つ))) (BASENP (NN 点検) (NN 窓))) (IN に)) (S (PP-SBJ (BASENP (NN 穴)) (IN が)) (VP (VBV 開い) (VP (MD た)))))) (PERIOD 。))
この 急停車 で 、 燃料 の 残量 の 監視 に 役立つ 点検 窓 に 穴 が 開い た 。
This abrupt stop created a hole in the sightglass which helps monitor fuel levels .