Complex sentence: The fossil s were discovered in 1952, in an underground limestone cave fissure and comprised of a skull, a partial jawbone, and vertebrae of the cervix, an incomplete right pelvic bone, and partial forelimbs.
Split into simpler sentences: The fossil s were discovered in 1952, in an underground limestone cave fissure. They consisted of a skull, a partial jawbone, and vertebrae of the cervix, an incomplete right pelvic bone, and partial forelimbs.