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\*.

[Q]: the reciprocal (inverse) of the period of oscillation is
[A]: Frequency


[Q]: there are currently how many sitting members on the us supreme court
[A]: 9


[Q]: who served as the head of the soviet union between 1924 and 1953
[A]:
Joseph Stalin