Complex sentence: Kassas started his football career in Lebanon on the youth team of Al-Mabarrah, then he played for first division teams in Lebanon such as Safa Sporting Club, Shabab Al-Sahel, Hekmeh, Olympic Beirut, and Nejmeh.
Split into simpler sentences: Kassas started his football career in Lebanon on the youth team of Al-Mabarrah. He then played for first division teams in Lebanon such as Safa Sporting Club, Shabab Al-Sahel, Hekmeh, Olympic Beirut, and Nejmeh.