Complex sentence: Unregistered opposition parties such as the Haq Movement and Bahrain Freedom Movement supported the plans, while the National Democratic Action Society only announced its support for "the principle of the right of the youth to demonstrate peacefully" one day before the protests.
Split into simpler sentences: Unregistered opposition parties such as Haq Movement and Bahrain Freedom Movement supported the plans. While the National Democratic Action Society only announced it supported "the principle of the right of the youth to demonstrate peacefully" one day before the protests.