Complex sentence: Marzia Caravelli had a blast racing late, has begun to get quite good results at international level ad, in 2011 at the age of 29, only in 2011, a 30-year-old made her debut in the Italian national team.
Split into simpler sentences: Marzia Caravelli had a blast in sport late, has begun to get quite good results at international level in 2011 at the age of 29, only in 2011. At 30-year-old made her debut in the Italian national team.