Determine if the sentence is true based on the text below:
George Palmer became severely depressed after the death of his wife.

Last Flight is a book published in 1937 consisting of diary entries and other notes compiled by aviation pioneer Amelia Earhart during her failed attempt that year at flying solo across the Pacific Ocean. Her husband, publisher George Palmer Putnam, edited the collection which was published posthumously as a tribute to his wife.
It's impossible to say