{"category":"aviation","date":{"calendar":null,"day":20,"day_url":"https://kogda.com/20-maya","month":5,"text":"20 мая 1977 года","year":1977,"year_url":"https://kogda.com/1977"},"id":134397,"kind":"event","library":[],"license":"Тексты: Русская Википедия, CC BY-SA 4.0. Люди и места: Wikidata, CC0.","mentions":[],"people":[],"places":[],"related":[],"slug":"pervyj-polyot-sovetskogo-istrebitelya-chetvyortogo-1977","source":{"license":"CC BY-SA 4.0","name":"Русская Википедия","url":"https://ru.wikipedia.org/wiki/20_мая"},"summary":null,"text":"","title":"Первый полёт советского истребителя четвёртого поколения Су-27","url":"https://kogda.com/e/pervyj-polyot-sovetskogo-istrebitelya-chetvyortogo-1977","weight":34}