<i>He was one of those in Haley who had died in World War II, killed by American bomb, actually, <u><b>while being held prisoner</b></u> by the Germans.</i><br/><br/>If the part in bold is made into a complete while-clause, which is it going to be?<br/><br/><i>(1) while they were held prisoner</i><br/><br/><i>(2) while they were bing held prisoner</i>