(S (S (PP-SBJ (BASENP (NN 強奪)) (IN は)) (VP (PRN (COMMA 、) (SBAR (SBAR (S (SBAR (S (PP-SBJ (BASENP (NN 彼ら)) (IN が)) (VP (PP-OBJ (BASENP (NN 授業)) (IN を)) (VP (VBO 始めよ) (VP (MD う))))) (INPH として)) (S-NSBJ (VP (PP-OBJ (NP (PP (BASENP (NN 旗)) (IN の)) (NN 儀式)) (IN を)) (VP (VBV し) (VP (MD た)))))) (NN 直後)) (IN に))) (VP (VBV 起こっ) (VP (MD た))))) (PERIOD 。))
強奪 は 、 彼ら が 授業 を 始めよ う として 旗 の 儀式 を し た 直後 に 起こっ た 。
The seizure occurred shortly after the flag ceremony , when they were due to start classes .