Q: 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.
Passage: Kallis wrote: "It is my choice whether I sing or do not sing the anthem. I certainly do not have to explain my reasons to anyone, especially you. Question: What even may or may not take place after Kallis makes his choice? Events: ['wrote', 'choice', 'sing', 'sing', 'explain']
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
sing