Complex sentence: Since 1972, the hotel has carried the banners Holiday Inn, Ramada, Radisson and now Sandman but is currently in the hands of the Sandman Inn Group, it had been a Holiday Inn hotel for most of its existence.
Split into simpler sentences: Since 1972, the hotel has carried the banners Holiday Inn, Ramada, Radisson and now Sandman. Although it is currently in the hands of the Sandman Inn Group, it had been a Holiday Inn hotel for most of its existence.