Question: What was this major international multi-sport event, with the opening ceremonies taking place on 27 July, and in which the South African field hockey player Bernadette Coston competed for the outh Africa women's national field hockey team?
Sentence (from "Tyla Flexman"): Tyla Flexman (born July 16, 1986 in New Westminster, British Columbia) is a field hockey player from Canada who played midfield for the Canadian Women's National Field Hockey Team from 2004-2012.
Relevant evidence: No