Complex sentence: On June 30, after 5 years of negotiating, Bass Pro and the City of Memphis signed an agreement for a 55-year lease which would create the main store, additional retail stores, restaurants, offices, and a river museum.
Split into simpler sentences: On June 30, after 5 years of negotiating, Bass Pro and the City of Memphis signed a permanent agreement. It is 55 year lease agreement which would create the store, retail, restaurants, offices, and a river museum.