 Complete the following phrase:  Blattman started participating in wheelchair athletics to improve his general fitness level. At the 1988 Seoul Games, he came fifth in the first heat of the Mens 200 m 1A  event. He competed in the Stoke Mandeville Games in 1989 and 1990. In 1990, at the World Championships and Games for the Disabled in Assen, Netherlands he won a gold medal in the mens 4x100 m relay T1 event and two bronze medals in the 100 m and 200 m T1 events. He won a silver medal in the 4×100 m event and a bronze medal in the 4×400 m event at the 1992 Summer Paralympics. At the 1996 Atlanta Games, he won a gold medal in the 1500 m event, for which he received a Medal of the Order of Australia, and a silver medal in the 800 m event. In 1998, Blattman won the Mens Marathon T51 event at the World Championships. At the 