Complex sentence: On his deathbed, Khomeini appointed a 25-man Constitutional Reform Council which named Khamenei as the next Supreme Leader of Iran and drew up amendments to the original constitution.
Split into simpler sentences: On his deathbed, Khomeini appointed a 25-man Constitutional Reform Council. The council named Khamenei as Khomeini's successor as Supreme Leader of Iran and drew up amendments to the original constitution.