Complex sentence: An alliance of several left-wing oriented groups called for demonstration and a closing rally, consequently, on April 13th, 5500 demonstrators were reminiscent of the ten homicide victims ´ fate commited by the NSU.
Split into simpler sentences: An alliance of several left wing oriented groups called for demonstration and a closing rally. Consequently on April 13th 5500 demonstrators were reminiscent of the fate of the ten homicide victims killed by the NSU.