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: "Who is the actor in "Rings", "Roseanne", and "The Big Bang Theory"?" whose answer is Johnny Galecki.
Each document should contain about 30 words, and these documents should contain useful information.

Query: main cast of Rings
Useful Output:

Doc 1: Here, we break down some of the show's key cast members and who they play — from elves and dwarves to harfoots and humans
Doc 2: Meet the Cast of 'The Lord of the Rings: The Rings of Power' Season 2 · More videos on YouTube · Galadriel (Morfydd Clark) · Arondir (Ismael Cruz
Doc 3: Who is Sauron? Sauron is the main antagonist in The Rings of Power, and is on a mission to rule Middle-earth by means of controlling the minds
Doc 4: The Rings Of Power Cast & Character Descriptions · More videos on YouTube · Morfydd Clark - Galadriel · Ismael Cruz Córdova – Arondir · Robert
Doc 5: Robert Aramayo plays Elrond, the Half-Elven Lord of Rivendell who also appeared in the Lord of the Rings films set thousands of years after The Rings of Power.