Complex sentence: The largest event organized by the Bl (A) ck Tea Society was the Really Really Democratic Bazaar on the Boston Common on July 27,2004, the second day of the DNC.
Split into simpler sentences: The largest event organized by the Bl (A) ck Tea Society was the Really Really Democratic Bazaar on the Boston Common on July 27th, 2004. The bazaar was on the Boston Common on July 27th, 2004, the second day of the DNC.