Complex sentence: SmartLynx flight crew members represent more than 17 nationalities, speak multiple languages, and the average experience of captains is above 5300 block hours and first officers--above 1900 block hours.
Split into simpler sentences: SmartLynx flight crew members represent more than 17 nationalities, therefore speaking multiple languages. The average experience of captains is above 5300 block hours and first officers--above 1900 block hours.