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\*.

where does the reed go on a saxophone
the mouthpiece

who has won the most trebles in scottish football
Celtic

when did us go to war in afghanistan

October 7, 2001