Complex sentence: The formal hotel classification of the DEHOGA (German Hotel and Restaurant Association) started on August 01,1996 and proved very successful with 80% of guests citing the hotel stars as the main criteria in hotel selection.
Split into simpler sentences: The formal hotel classification of the DEHOGA (German Hotel and Restaurant Association) started on 1. August 1996 and proved very successful with 80% of guests citing the hotel stars as the main criteria in hotel selection.