For this market to resolve to Yes, the first event must be documented by a Source Agency to have occurred before the second event and before the deadline date. If both events occur on the same date, temporal precedence is determined by Source Agency reporting with specific timestamps. If events occur simultaneously with identical timestamps, the market resolves to No. If either event is cancelled or postponed indefinitely, it is considered as not occurring. If only one event occurs by the deadline, the market resolves based on whether it was the first event specified. Markets asking which happens first can have multiple strikes representing different potential first events.