What is the relationship between Jeff Bezos and Amazon in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

The news marked another effort by Amazon founder Jeff Bezos to leverage its large customer base with the Washington Post, which he purchased with $250 million from his personal fortune in 2013.

Answer: owner_of