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: "What was the theme song of the the fifth annual Vengeance WWE event?" whose answer is Happy?.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Vengeance WWE 2019 theme song
Useful Output:

Doc 1: Dominik Dijakovic 2019 v3 - "Vengeance" WWE NXT Entrance Theme  Sheamus – Celtic Warrior's Fire | Custom WWE Theme Song | Epic Entrance Music.
Doc 2: Title: Vengeance Artist: def rebel Album: WWE: Vengeance (Dominik Dijakovic) - Single Genre: Soundtrack Released: Aug 14, 2020 ℗ 2020 WWE,
Doc 3: Provided to YouTube by TuneCore Vengeance (WWE Vengeance 2004) · WWE & Jim Johnston WWE: Uncaged IX ℗ 2019 WWE, Inc. Released on: 2019-08-09
Doc 4: 2019-2020: Dominik Dijakovic 4th WWE Theme Song - "Vengeance" by def rebel · Comments3.
Doc 5: WWE Vengeance Day 2025 Official Theme Song - "The Champ is here" · Comments.