"The woman is not popular."
Translation:여자는 인기가 없습니다.
From what I understand, the woman is the topic of the sentence and is therefore marked by -는. As my teacher explained to me, that piece -는 can be like saying "As for the woman, she is not popular." It indicates what the topic is or what the topic is changing to. Please correct me if I'm wrong or if more can be added.