TASK DEFINITION: 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\*.
PROBLEM: what does mpv stand for in a cbc test

SOLUTION: Mean platelet volume

PROBLEM: when does project blue book come out on history channel

SOLUTION: January 8, 2019

PROBLEM: who is the chief of staff at the white house

SOLUTION:
John F. Kelly