sentence1: Track Star Marion Jones, winner of 3 gold medals in the 2000 Sydney Olympics, has tested positive for the performance enhancing drug, EPO. The hormone helps create extra red blood cells which allows the user's body to absorb extra oxygen. Jones was expected to compete in yesterday's Golden League meet in Zurich, Switzerland, but left early in the morning for "personal reasons." It was announced earlier today (UTC) that she had tested positive for EPO. Jones faces a two year ban if her B test sample comes back positive. Jones has a history of association with steroid users and dealers. In 1999, her then husband CJ Hunter tested positive for a similar drug, Nandralone. He had to withdraw from the 2000 Sydney Olympics, and received a two year ban.
sentence2: Marion Jones took part in the 2000 Sydney Olympics.