You will be given a definition of a task first, then some input of the task.
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: Lord Stevens, who was investigating a total of 362 transfers, did not give details of the questionable deals as he delivered his "observations and recommendations" into alleged so-called bungs after a nine-month inquiry on Wednesday. But he revealed that certain elements had been passed on to the police. Question: What did Lord Stevens do during the delivery? Events: ['investigating', 'transfers', 'give', 'delivered', 'observations', 'recommendations', 'inquiry', 'revealed', 'passed']
Output:
revealed