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 sang the original i can only imagine?" whose answer is Bart Millard.
Each document should contain about 30 words, and these documents should contain useful information.

Query: original singer of i can only imagine
Useful Output:

Doc 1: Earlier this year, Trace Adkins was one of the stars of "I Can Only Imagine," a film that shared the story of MercyMe singer Bart Millard's life
Doc 2: I Can Only Imagine | Bart Millard Shares Story Behind Song and Film · "As long as we're breathing there's always hopeNo one is out of the
Doc 3: Bart Millard couldn't have imagined the impact a hastily written song would have on the world when he first penned I Can Only Imagine, alone on
Doc 4: In 2001, Christian rock band MercyMe released "I Can Only Imagine," the lyrics for which lead singer Bart Millard wrote in just ten minutes.
Doc 5: More worship songs with lyrics - https://youtube.com/playlist?list=PLAY_kpiw4--zib6Fg4_VQ4DltF9DfqQFQ LYRICS: Verse 1 I can only imagine