Complex sentence: The Islamic Center organizes an annual ceremony, held at the Riverside Convention Center, at which all Muslims from the Inland Empire who are graduating from high schools or college are honored, and cash prizes awarded ot top students in several categories.
Split into simpler sentences: The Islamic Center organizes an annual ceremony, held at the Riverside Convention Center. During the ceremony, all Muslims from the Inland Empire who are graduating from high schools or college are honored, and cash prizes are awarded to top students in several categories.