Complex sentence: Aravidis started his carrer in Atromitos, jumping to Panionios in 2006, before being transfered to Aris Thessaloniki, he was a prominent member of Greece U21 team having participated in 24 games scoring 9 goals.
Split into simpler sentences: Aravidis started his carrer in Atromitos, jumping to Panionios in 2006, before being transfered to Aris Thessaloniki. He was a prominent member of Greece U21 team having participated in 24 games scoring 9 goals.