instruction:
In this task, you will be given a passage, a question and a list of single-word events identified from the passage. The goal is to point out all events from the given event list that can answer the question. If a question is unanswerable or none of the events answer the question, output should be empty.
question:
Passage: The two companies have recently agreed to extend their two existing contracts on purchasing Chinese electricity via the 110- kV power grid for the next four years, ensuring power supplies for the five Vietnamese provinces of Lao Cai, Lai Chau, Ha Giang, Yen Bai and Tuyen Quang. Vietnam has purchased 588 million kWh each year under the contracts since they were signed in 2004, said the report. Question: What started happening before the contracts were extended? Events: ['agreed', 'extend', 'purchasing', 'ensuring', 'purchased', 'signed', 'said', 'report']
answer:
purchasing

question:
Passage: He said his men also captured 100 SPLA soldiers as well as 315 automatic rifles and 17 mortars. "Most important of all, our forces seized Ajak airport, outside Wun Roj, which was built by foreign organizations and which is equipped with modern communications devices and lighting systems," Obanj said. Question: What has happened after the forces seized Ajak airport? Events: ['said', 'captured', 'seized', 'built', 'equipped', 'is', 'said']
answer:
said

question:
Passage: A member of the Palestinian presidential guard was killed and several others injured Sunday in a clash with supporters of the Palestinian ruling party Hamas, medical and security officials said. A security official said Hamas members tried to storm a southern Gaza training camp for the presidential guard, which Hamas has accused of targeting prime minister Ismail Haniya on Thursday by firing on his convoy. Question: What was happening when the Palestinian presidential guard targeted the prime minister? Events: ['killed', 'injured', 'clash', 'said', 'said', 'tried', 'storm', 'accused', 'targeting', 'firing', 'convoy']
answer:
convoy