Complex sentence: As Kouyaté turned 19, he left Brussels as his former employers did not pay him three months of wage, he subsequently moved to Belgian rivals Anderlecht on a four-year deal for a free transfer.
Split into simpler sentences: As Kouyaté turned 19, he left Brussels as his former employers did not pay him three months of wage. He subsequently moved to Belgian rivals Anderlecht on a four-year deal for a free transfer.