Complex sentence: The first date being 20 November 1936, the death of Jose Antonio Primo de Rivera (and of Spanish anarchist leader Buenaventura Durruti) and the second date being 20 November 1975, the death of Francisco Franco Spain's fascist dictator.
Split into simpler sentences: The first date is 20 November 1936, the death date of José Antonio Primo de Rivera (and of Spanish anarchist leader Buenaventura Durruti). The second date is 20 November 1975, the death date of Francisco Franco, Spain's fascist dictator.