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.

Input: Consider Input: Passage: Mahathir had a coronary artery bypass surgery in 1989, and in 1999 he underwent full treatment for a lung infection. Question: What happened after Matahir had surgery? Events: ['had', 'surgery', 'underwent', 'treatment', 'infection']

Output: underwent

Input: Consider Input: Passage: An earthquake measuring 6.6 on the Richter scale hit the northwest Chinese region of Xinjiang on Friday, killing three people, the State Seismological Bureau said. Question: What did the earthquake do before the State Seismological Bureau's statement? Events: ['earthquake', 'measuring', 'hit', 'killing', 'said']

Output: hit

Input: Consider Input: Passage: At the time, government scientists had studied the brains of 444 hunting hounds that had died after showing signs of distress associated with BSE, and found abnormalities called fibrils, tiny fibres first noticed by scientists studying scrapie, a spongiform encephalopathy in sheep. The presence of fibrils, said the scientists, confirmed that some of the brains showed signs of a canine equivalent of mad cow disease. Question: What was happening before the brains were studied? Events: ['studied', 'died', 'showing', 'distress', 'found', 'abnormalities', 'noticed', 'studying', 'presence', 'said', 'confirmed', 'showed', 'signs', 'disease', 'time', 'associated', 'encephalopathy']
Output: showing