Question: Anna Guseva is a Russian distance swimmer, she competed in the Women's marathon 10 kilometre, finishing in 10th place, in which 2012 major international multi-sport event celebrated in the tradition of the Olympic Games, as governed by the International Olympic Committee (IOC)?
Sentence (from "2012 Summer Olympics"): 10,768 athletes from 204 National Olympic Committees (NOCs) participated.
Relevant evidence: No