When was the  martial artist to which  Yoshihiro Nakao lost at after suffering an ACL injury as a result of a leg kick from Silva in the first round born? 
Yoshihiro Nakao:  Nakao lost to Antônio Silva at after suffering an ACL injury as a result of a leg kick from Silva in the first round. Antônio Silva (fighter): Antônio Carlos Silva (born September 14, 1979) is a Brazilian mixed martial artist who formerly competed in the heavyweight division of the UFC.
September 14, 1979)