In this task, You are given an open-domain question that can be answered based on factual information. Your task is to provide \*short\* answer (in a few words only) for the given question. The short answer can be one or more entities or it can also be boolean \*yes\* or \*no\*.

Example Input: when did angel leave buffy the vampire slayer
Example Output: 1999

Example Input: when did nba draft go to two rounds
Example Output: 1989

Example Input: when was the drinking age changed to 21 in the united states
Example Output:
mid-1988