Complex sentence: The Men's rugby sevens tournament at the 2016 Summer Olympics was held in Brazil, hosted at the Deodoro Stadium, a temporary outdoor stadium constructed as part of the Deodoro Modern Pentathlon Park in Rio de Janeiro.
Split into simpler sentences: The men's rugby sevens tournament at the 2016 Summer Olympics was held in Brazil. It was hosted at the Deodoro Stadium, a temporary outdoor stadium constructed as part of the Deodoro Modern Pentathlon Park in Rio de Janeiro.