Complex sentence: Dr Festus Iyayi was one of the best lecturers at the department of business administration University of Benin and his students spans from Undergraduates, Masters and Postgraduate.
Split into simpler sentences: Dr Festus Iyayi was one of the best lecturers at the Department of Business Administration, University of Benin. His students spanned from Undergraduates, Masters and Postgraduate.