Complex sentence: He became disillusioned with Nigeria after presidential candidate Moshood Abiola failed to win the Nigerian presidency after an inconclusive election in 1993 and began to search for scholarship opportunities in the United States.
Split into simpler sentences: He became disillusioned with Nigeria after presidential candidate Moshood Abiola failed to win the Nigerian presidency after an inconclusive election in 1993. Omalu began to search for scholarship opportunities in the United States.