Complex sentence: Iwan Wirth (born May 1970, Switzerland) is President of Hauser & Wirth, an international gallery of contemporary art and modern masters, which he co-founded with his wife, Manuela Wirth and mother-in-law, Ursula Hauser in Switzerland in 1992.
Split into simpler sentences: Iwan Wirth (born May 1970, Switzerland) is the President and co-founder of Hauser & Wirth, an international gallery of contemporary art and modern masters. Together with Manuela Wirth and Ursula Hauser (his wife and mother-in-law respectively), Iwan Wirth founded Hauser & Wirth in Switzerland in 1992.