What is the fine-grained topic of the following text: Ironman 70.3 Galveston (2.4 mile swim / 56 mile bike / 13.1 mile run) in Texas this Sunday will be the first race of the year and with American, Andrew Starykowicz, Canadians Brent McMahon and Lionel Sanders, and Andreas Dreitz of Germany the field is certainly stacked. Only return the topic.
Ironman 70.3 Galveston race in Texas