{"category":null,"date":{"calendar":null,"day":31,"day_url":"https://kogda.com/31-maya","month":5,"text":"31 мая 1910 года","year":1910,"year_url":"https://kogda.com/1910"},"id":136205,"kind":"birth","library":[],"license":"Тексты: Русская Википедия, CC BY-SA 4.0. Люди и места: Wikidata, CC0.","mentions":[],"people":[{"name":"Николай Ефимов","slug":"nikolaj-efimov","url":"https://kogda.com/p/nikolaj-efimov"}],"places":[],"related":[],"slug":"rozhdenie-nikolaj-efimov","source":{"license":"CC BY-SA 4.0","name":"Русская Википедия","url":"https://ru.wikipedia.org/wiki/31_мая"},"summary":null,"text":"советский математик, член-корреспондент АН СССР","title":"Николай Ефимов","url":"https://kogda.com/e/rozhdenie-nikolaj-efimov","weight":11}