Complex sentence: The "10th" (irregular) Venice International Film Festival was held from 30 August to 5 September 1942 and together with the 1940 and 1941 are'considered as if they did not happen'.
Split into simpler sentences: The "10th" (void) Venice International Film Festival was held from 30 August to 5 September 1942. Together with the 1940 and 1941 it is'considered void-as if they did not happen'.