Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Input: Consider Input: Context: The Deepwater Horizon oil spill (also referred to as the BP oil spill, the BP oil disaster, the Gulf of Mexico oil spill, and the Macondo blowout) began on 20 April 2010 in the Gulf of Mexico on the BP-operated Macondo Prospect.
Question: What year did Deepwater Horizon oil spill start?

Output: 20 april 2010

Input: Consider Input: Context: The All-Russia People's Front (Russian: ), known by its Russian initialism ONF, is a movement in Russia started in 2011 by then-Prime Minister of Russia Vladimir Putin to provide United Russia with ''new ideas, new suggestions and new faces''.
Question: Who led All-Russia People's Front?

Output: vladimir putin

Input: Consider Input: Context: Two genes located near each other on chromosome 15 (CKMT1A and CKMT1B (this gene)) have been identified which encode identical mitochondrial creatine kinase proteins.
Question: What is the name of CKMT1A's chromosome?
Output: chromosome 15