Complex sentence: Aisha Muhammadu Buhari (born February 17,1971) is the wife of Muhammadu Buhari, the President of Nigeria, who assumed office on May 29,2015 after defeating the then-incumbent President Goodluck Jonathan.
Split into simpler sentences: Aisha Muhammadu Buhari (born February 17,1971) is the current First Lady of Nigeria. She is married to Muhammadu Buhari, the President of Nigeria, who assumed office on May 29,2015 after defeating the then-incumbent President Goodluck Jonathan.