Complex sentence: The BurJuman Business Tower which is the tallest tower in the area is located located adjacent to The BurJuman Mall, it is a 30 storey office tower where 22 floors are used for office purpose.
Split into simpler sentences: The BurJuman Business Tower, which is the tallest tower in the area, is adjacent to The BurJuman Mall. It is a 30 storey tower, of which 22 floors are used for office purpose.