Complex sentence: In the 2009 Greek legislative election he was elected a member of the Hellenic Parliament for the Athens A' constituency and was elected unanimously, by the secretariat of the SYRIZA, as the head of its parliamentary group.
Split into simpler sentences: In the 2009 Greek legislative election, he was elected a member of the Hellenic Parliament for the Athens A' constituency. He was elected unanimously by the secretariat of the SYRIZA as the head of its parliamentary group.