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.

Q: Passage: At first he was surrounded by some 30 armed civil guard troops who were protecting him. Behind him stretched the huge crowd. Question: What happened before the troops surrounded him? Events: ['surrounded', 'protecting', 'stretched']

A: protecting
****
Q: Passage: It is the fist telescope in China specialized in NEO observation and one of only six, one-meter NEO observation telescopes in the world, said Yang Jiexing, a researcher with the observatory. Near-earth objects are comets and asteroids that have been nudged by the gravitational pull and may collide with earth. Question: What might happen before comets and asteroids are nudged by the gravitational pull? Events: ['is', 'said', 'are', 'nudged', 'collide']

A: 
****
Q: Passage: The forecast is a "slight increase" over its outlook issued in November, due to stronger-than-expected predictions for world economic growth next year, OPEC said. Oil demand will increase in all major regions, with China accounting for more than one fifth of the increase of 1.6 million bpd. Question: What happened before the forecast? Events: ['forecast', 'is', 'issued', 'predictions', 'growth', 'demand', 'increase', 'accounting']

A:
issued
****
