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: when does lexi die in grey's anatomy

SOLUTION: the eighth-season finale

PROBLEM: who is the founder of the wounded warrior project

SOLUTION: John Melia

PROBLEM: the differences between the different spectral types of stars are primarily due to

SOLUTION:
ionization state