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\*.

who has the most gold medals in history
Michael Phelps

when were air brakes first used on trucks
the early 20th century

what do first 3 numbers of ssn mean

Area Number