Complex sentence: Gateway currently (April 2006) has 120 000m2 of modern retail facilities of which 50 000m2 is dedicated to entertainment these include a wave pool for surfers, a skate park and the highest indoor climbing rock in the world.
Split into simpler sentences: Gateway currently (April 2006) has 120,000 sq. meters of modern retail facilities of which 50,000 sq. meters are dedicated to entertainment. These include a wave pool for surfers, a skate park and the highest indoor rock-climbing in the world.