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: "So Fly was a song co-produced by the rapper who began her career with what R&B group?" whose answer is Sista.
Each document should contain about 30 words, and these documents should contain useful information.

Query: So Fly Rihanna R&B group
Useful Output:

Doc 1: On here you'll find old bangers from the likes of Lauryn Hill, TLC, Rihanna and more. Whatever the vibe, read on for our list of the best R&B songs ever.
Doc 2: Here, in honor of the star's 30th birthday, we wade through that robust, history-making catalog, taking stock of her best tracks to date.
Doc 3: She was as enigmatic and cutting edge as R&B, pop and the rest of the music world may ever see. We glimpse the brief life of an angel. So fly.
Doc 4: Nicki Minaj debuts "Fly" featuring Rihanna. Take a look at the video here.
Doc 5:  artist/5pKCCKE2ajJHZ9KAiaK11H?si=9rF5wDYKQQ2X3lnjNEAptw https://twitter.com/Rihanna  Fly by Nicki & Rihanna is very underrated! #nickiminaj #