Complex sentence: In 2010 a new development campaign was launched at the London Bach Society's 20th Bachfest entitled "Bach for Life", the chief aim of which is to secure a central headquarters for the London Bach Society.
Split into simpler sentences: In 2010 a new development campaign was launched at the London Bach Society's 20th Bachfest entitled "Bach for Life". The chief aim is to secure a central headquarters for the London Bach Society.