Centipede
... that Centipede were an English jazz/progressive rock band with more than 50 members?
... that <b id="mwARo"><a href="./Centipede_(band)" id="mwARs" rel="mw:WikiLink" title="Centipede (band)">Centipede</a></b> were an English <a href="./Jazz" id="mwARw" rel="mw:WikiLink" title="Jazz">jazz</a>/<a href="./Progressive_rock" id="mwAR0" rel="mw:WikiLink" title="Progressive rock">progressive rock</a> band with more than 50 members?