Swimming at the 2004 Summer Paralympics
Swimming at the 2004 Summer Paralympics , in the Olympic Aquatic Centre was competed in freestyle , backstroke and butterfly ( classes Sn ) , the breaststroke ( classes SBn ) and individual medley ( classes SMn ) . 
<triplet> Swimming at the 2004 Summer Paralympics <subj> Olympic Aquatic Centre <obj> location <triplet> 2004 Summer Paralympics <subj> 2004 <obj> point in time