Complex sentence: Prasert Prasarttong-Osoth is a Thai billionaire businessman, the founder and owner of Bangkok Dusit Medical Services, Thailand's largest private health care group, and the owner of a regional airline, Bangkok Airways.
Split into simpler sentences: Prasert Prasarttong-Osoth is a Thai billionaire businessman, the founder of Bangkok Dusit Medical Services, Thailand's largest private health care group. He owns Bangkok Dusit Medical Services, Thailand's largest private health care group, and a regional airline, Bangkok Airways.