Complex sentence: He made his debut GP2 Series race in 2013 Sepang GP2 Series round, his lap time dropped to more than 2 minutes a lap later in final stint and finished only 21st in featured race, which is the last place in classified drivers.
Split into simpler sentences: He made his debut GP2 Series race in 2013 Sepang GP2 Series round. Later in final stint, his lap time dropped to more than 2 minutes a lap and finished only 21st in featured race, which is the last place in classified drivers.