 Complete the following sentence: Pessi soju fun SKP ni ọpọlọpọ awọn ipade pataki ti agbaye ti awujo awujo; ni : 19th 1952, 22nd 1961 and 23rd 1966 congress of the Communist Party of the Soviet Union, the 1957 and 1960 International Meeting of Communist and Workers Parties and the 50th anniversary of the October Revolution. Ìpàdé Kọmíṣọnnì àti Àwọn Ẹgbẹ Òṣìṣẹ Àgbáyé ní 1957 àti 1960 àti àyájọ àádọta ọdún Ìyípadà Ọwàrà. 