Complex sentence: Tkachenko was a member of the Eleventh Convocation of the Parliament of the Ukrainian SSR, and since 1994 has been elected to the Parliament of Ukraine for four consecutive terms.
Split into simpler sentences: Tkachenko was a member of the Parliament of Ukrainian SSR of 11th Convocation. Since 1994 Tkachenko has been elected to the Parliament of Ukraine for 4 consecutive terms.