Complex sentence: On 5 April 1990, the new Volkskammer elected the CDU's Sabine Bergmann-Pohl as its president; as the State Council was at the same time dissolved, she became East Germany's interim head of state.
Split into simpler sentences: On 5 April 1990, the new Volkskammer elected the CDU's Sabine Bergmann-Pohl as its president. As the State Council was at the same time dissolved, she became East Germany's interim head of state.