Complex sentence: He made his debut for the national Kenya Sevens team at the 2011 Hong Kong Sevens tournament, and represented them during the 2011--12 and 2012--13 IRB Sevens World Series.
Split into simpler sentences: He made his debut for the national Kenya Sevens team at the 2011 Hong Kong Sevens tournament. He represented them during the 2011--12 and 2012--13 IRB Sevens World Series.