Complex sentence: Sambo competitions at the 2015 European Games in Baku were held on 22 June 2015 at the Heydar Aliyev Arena, consisting of eight events, four in each gender.
Split into simpler sentences: Sambo competitions at the 2015 European Games in Baku will held on 22 June 2015 at the Heydar Aliyev Arena in Baku. The competition will consist of eight events, four in each gender.