Complex sentence: After the 1979 Iranian revolution, Habib Elghanian was executed by the new government, which seized the building and handed ownership of it to the state-controlled Islamic Revolution Mostazafan Foundation, tied to the Iranian Revolutionary Guards.
Split into simpler sentences: After the 1979 Iranian revolution, Elghanian was executed by the new government. The government seized the building and handed ownership of it to the state-controlled Islamic Revolution Mostazafan Foundation, which is tied to the Iranian Revolutionary Guards.