Jim Mattis
Table:
Jim Mattis

In office
November 9, 2007 – August 11, 2010
President

George W. Bush
Barack Obama

Preceded by	Lance L. Smith
Succeeded by	Raymond T. Odierno

With reference to the table, state whether the hypothesis is entailed, neutral, or refuted. Provide the verdict inside {"answer": "YOUR ANSWER"} as JSON.

Assertion: Jim Mattis was appointed by Barack Obama.

answer: refuted