Complex sentence: Etimoni Timuani represented Tuvalu at 2016 Summer Olympics in the 100 metre event, making Tuvalu the only country to send one competitor to the 2016 Olympic Games.
Split into simpler sentences: Etimoni Timuani represented Tuvalu at 2016 Summer Olympics in the 100 metre event. Tuvalu was the only country to send one competitor to the 2016 Olympic Games.