You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Kim Jae-joong, star of the series Triangle, is best know as a member of what pop group?" whose answer is JYJ.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Kim Jae-joong pop group
Useful Output:

Doc 1: He debuted in 2003 as a member of the legendary K-pop boy group TVXQ. “I invested a lot in making the physical album of 'Flower Garden' because
Doc 2: The girl group will be debuting this October, and the boy group will be debuting sometime in 2025.
Doc 3: Kim Jaejoong posted a photo on Instagram that seemed to foreshadow something. It posted the caption, 'VII Your Name (SOON)'. It spoiled the new group.
Doc 4: Kim Jae-joong, who turned from a second-generation idol group to a producer of a fifth-generation idol group 21 years after his debut,
Doc 5: After he left the group with members Kim Jun-su and Park Yoo-chun, the three formed boy band JYJ. Kim is also active as a solo singer and actor,