Complex sentence: The group is also responsible for the 11 November 2010 Poppy Burning protests in Central London, in which 2 large plastic poppies were burned during the 2 minute silence held on Remembrance Day.
Split into simpler sentences: The group is also responsible for the 2010 Poppy Burning protests in Central London. During which 2 large plastic poppy's were burned during the 2 minute silence held on Remembrance Day.