Complex sentence: The physician founders left in 2012 to start another business venture when the community was acquired by WorldOne, Inc. in July 2012 and rebranded to "SERMO" in 2014.
Split into simpler sentences: The physician founders left in 2012 to start another business venture. SERMO was acquired by WorldOne, Inc. in July 2012 and rebranded to SERMO in 2014.