<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?al-sadr, mmoja wa viongozi mashuhuri wa washia wa karne ya 20, alitoweka pamoja na watu wengine wawili akiwa ziarani libya mwaka 1978.  <response>: al-sadr, one of the most prominent shia clerics of the 20th century, disappeared along with two others during a trip to libya in 1978. 