의무는

as for the duty

→ 의무
phrase Rare #21,536
as for the duty 의무 means “duty,” “obligation,” or “responsibility,” and 는 is the topic marker. The phrase is often translated as “the duty is” or simply “the duty,” depending on the sentence.
KO: 이 일은 제 의무는 아니에요.
EN: This task isn't my responsibility.

우리의 의무는 도와주는 것 이다.

Our duty is to help.

대답할 의무는 없소.

You have no obligation to answer.

— 공각기동대 (1995)

의무는 아냐

It's not required.

— 추락의 해부 (2023)

의무는 의무

Duty is duty.

— 양철북 (1979)