Complex sentence: Aghdashloo was the holder and coordinator of several exhibitions after the Iranian revolution that though none of them were special exhibitions of his works, but had an important role in introducing contemporary Iranian art to the people inside and outside Iran.
Split into simpler sentences: Aghdashloo was the holder and coordinator of several exhibitions after the Iranian revolution. While none of them were special exhibitions of his works, they played an important role in introducing contemporary Iranian art to the people inside and outside Iran.