Complex sentence: Today, only some forty companies have halls in London, which are commonly available for business and social functions, such as commercial and society meetings and dinners; the oldest hall now extant is that of the Worshipful Society of Apothecaries, dating from 1672.
Split into simpler sentences: Today, only some 40 companies have halls in London, which are commonly available for business and social functions, such as commercial and society meetings and dinners. The oldest hall now extant is that of the Worshipful Society of Apothecaries, dating from 1672.