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 died in the plane crash in greys anatomy
Dr. Lexie Grey

where did keep your fingers crossed come from
biblical Kingdom of Israel

when was under god added to pledge of allegience

June 14, 1954