Complex sentence: Ranitović was one of only two athletes selected by Montenegro to compete at the 2009 World Championships in Athletics, and he ended up recording a time of 1:53.17 in the second heat of the 800 metre race.
Split into simpler sentences: Ranitović was one of only two athletes selected by Montenegro to compete at the 2009 World Championships in Athletics. He ran 1:53.17 (min: sec) in the second heat of the 800 metre race.