Complex sentence: At the San Francisco World Spirits Competition, Woodford Reserve's best performance was in 2005, when it won a double gold medal, and it has since won gold (2006--2007) and silver medals at this annual event (2008,2010).
Split into simpler sentences: At the San Francisco World Spirits Competition, Woodford Reserve's best performance was in 2005, when it won a double gold medal. It has since won gold (2006--2007) and silver medals (2008,2010).