Complex sentence: As of 2012, Bolliger & Mabillard has 85 operating roller coasters worldwide, twenty of which are listed among the "Amusement Today" Golden Ticket Awards Top 50 Steel Coasters List for 2011, and three are in the top 10.
Split into simpler sentences: As of 2012, Bolliger & Mabillard has 85 operating roller coasters worldwide. Twenty of their creations are listed among the "Amusement Today" Golden Ticket Awards Top 50 Steel Coasters List for 2011, including three in the top 10.