This is the 16583rd most frequent Korean word.
사망했다는
"사망했다는" means "deceased" or "passed away."
In this sentence, '사망했다는' functions as an adjectival phrase that introduces the reported content that an individual has died, requiring an external source for this information.
그가 장난감을 삼키다가 질식사로 사망했다는 소식을 들었습니다.
I heard the news that he died due to choking on a toy.
'사망했다는' connects the factual content regarding someone's passing, emphasizing the indirect nature of the knowledge presented.
그의 친구가 사망했다는 이야기에 모두가 충격을 받았습니다.
Everyone was shocked by the story that his friend had died.
Here, '사망했다는' is part of a clause indicating reported information about the death, linking the indirect source of this finding.