Complex sentence: The main opposition parties in Turkey, for example, condemned the attempt, while several international leaders--such as those from the European Union, NATO, and the United States--called to respect the institutions in Turkey and its elected officials.
Split into simpler sentences: The main opposition parties in Turkey, for example, condemned the attempt. While several international leaders--such as those from the European Union, NATO, and the United States--called to respect the institutions in Turkey and its elected officials.