Complex sentence: One of Wye College's major contributions was not only the development of a number of new varieties of hops used in the brewing of beersuch as Wye Challenger, Wye Northdown, Wye Target and Wye Yeoman.
Split into simpler sentences: One of Wye College's major contributions was the development of a number of new strains of hops used in the brewing of beer. These new varieties include Wye Challenger, Wye Northdown, Wye Target and Wye Yeoman.