Track and Field events have started.    I guess I don't keep up with this field, because I was surprised to see a qualifying heat called mixed relay, that involved teams of two females and two males.  Also, there is now another way to qualify for individual events through something called   repechage . Whereas in previous years the qualifiers to the semifinals would include the top two or three in each heat plus 'lucky losers' who didn't finish in these places but still had fast times, the athletes who do not qualify by finishing in the automatic qualifying positions in round one heats will have a second chance to qualify for the semi-finals by participating in repechage heats. The top athletes from the repechage will then qualify for the semifinals along with the athletes who finished in the top places in the initial heats.  where someone can be racing in a heat of losers, and win.  This option is only available from the 200 meter through 1500 meter races. The Olympic