Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Example input: Which writer rode Devon Loch in the 1956 Grand National?
Example output: dick francis
Example explanation: The answer is precise and accurately answers the question based on a fact. This is a good example
Q: Who was an English naturalist who realised and presented compelling evidence that all species of life have evolved over time from common ancestors, through the process he called natural selection?
A:
charles darwin