Question: What year was the mixed martial artist born, who was defeated by the former Tachi Palace Fights Featherweight Champion?

Context paragraphs:
Tachi Palace Fights 8: Tachi Palace Fights 8 was a mixed martial arts event held by Tachi Palace Fights (TPF) on February 18, 2011, at the Tachi Palace Hotel & Casino in Lemoore, California.

2011 in Tachi Palace Fights: The year 2011 is the 3rd year in the history of Tachi Palace Fights, a mixed martial arts promotion based in The United States.  In 2011 Tachi Palace Fights held 4 events beginning with, "TPF 8: All or Nothing".

2010 in Tachi Palace Fights: The year 2010 is the 2nd year in the history of Tachi Palace Fights, a mixed martial arts promotion based in The United States.  In 2010 Tachi Palace Fights held 5 events beginning with, "TPF 3: Champions Collide".

Joe Soto: Joseph Angel Soto (born March 22, 1987 in Porterville, California) is an American professional mixed martial artist currently competing in the Bantamweight division of the Ultimate Fighting Championship.  A professional competitor since 2006, Soto has also formerly competed for Bellator where he was the first Bellator Featherweight Champion and winner of their inaugural Featherweight Tournament.  He is also the former Tachi Palace Fights Bantamweight Champion.

2009 in Tachi Palace Fights: The year 2009 is the 1st year in the history of Tachi Palace Fights, a mixed martial arts promotion based in The United States.  In 2009 Tachi Palace Fights held 3 events beginning with, "TPF: Best of Both Worlds".

Tachi Palace Fights 10: Tachi Palace Fights 10 was a mixed martial arts event held by Tachi Palace Fights (TPF), on August 5, 2011 at the Tachi Palace Hotel and Casino in Lemoore, California.

Georgi Karakhanyan: Georgi Karakhanyan is an Armenian professional mixed martial artist who competes in the Featherweight division of Bellator MMA.  A professional competitor since 2006, Karakhanyan has also formerly competed for the World Series of Fighting, DREAM, Tachi Palace Fights, and King of the Cage.  Karakhanyan is also the former WSOF Featherweight Champion.

Tachi Palace Fights 9: Tachi Palace Fights 9 was a mixed martial arts event held by Tachi Palace Fights (TPF) on Friday, May 6 at the Tachi Palace Hotel and Casino in Lemoore, California.

Eddie Yagin: Eddie Yagin (born March 23, 1979) is a Filipino-American mixed martial artist, who is best known for his two-fight stint with the Ultimate Fighting Championship.  Yagin holds notable wins over Joe Soto and Mark Hominick, and is a former Tachi Palace Fights Featherweight Champion.

Tachi Palace Fights 7: Tachi Palace Fights 7: Deck the Halls was a mixed martial arts event held by Tachi Palace Fights on December 2, 2010 at the Tachi Palace Hotel & Casino in Lemoore, California.

Supporting paragraphs: Eddie Yagin Joe Soto
Answer: 1987