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 lead singer in casting crowns?" whose answer is Mark Hall.
Each document should contain about 30 words, and these documents should contain useful information.

Query: lead singer of casting crowns
Useful Output:

Doc 1: Lead singer for Casting Crowns, Mark Hall, shares some solid advice with us about reconnecting after such a long time of separation during
Doc 2: John Mark Hall, lead singer of Casting Crowns, heard, “You're going to die.” It was 2015 and the Grammy-winning Christian worship band was approaching 10
Doc 3: Casting Crowns lead singer, Mark Hall's son, John Michael, on a bass solo intro and the two of them having a good time performing together # #
Doc 4: Casting Crowns' lead singer Mark Hall is sick. Pray for him. And enjoy Day 18 of their "Thrive" devo. Casting Crowns profile picture.
Doc 5: Not a new band member, but a new family member! Casting Crowns lead singer Mark Hall announced the birth of his grandson, John Lincoln Hall!