Complex sentence: Following his election as President of Ecuador, Rafael Correa called for a referendum on establishing a Constituent Assembly to write a new constitution for the country, which was held on April 15,2007 and passed with over 80% approval.
Split into simpler sentences: Following his election as President of Ecuador, Rafael Correa call for a referendum to form a constitutional assembly to write a new constitution for the country. The referendum, held on April 15,2007, passed with over 80% approval.