ㄴ다고 알리다

it is known that X

Six of these lines use the passive form, meaning it is known or reported to be so, which is how a presenter cites a fact without owning it: lettuce is known to contain a compound that makes you sleepy, deliveries are said to start late next year, it is reported he wanted to move to Korea. The active form, telling or letting someone know, appears in the other lines. The passive version is the one you will hear in explainers.

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