Complex sentence: Andrew Reynolds has been skateboarding since the age of nine and he emerged onto the skateboarding scene in the early 1990s and won Thrasher magazine's "Skater of the Year" award in 1998.
Split into simpler sentences: Andrew Reynolds has been skateboarding since the age of nine and he emerged onto the skateboarding scene in the early 1990s. He won Thrasher Magazine's "Skater of the Year" award in 1998.