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 wins the men's royal rumble 2018?" whose answer is Shinsuke Nakamura.
Each document should contain about 30 words, and these documents should contain useful information.

Query: 2018 Royal Rumble winner
Useful Output:

Doc 1: A championship match at WrestleMania 34 hangs in the balance in this Royal Rumble Match featuring Seth Rollins, Roman Reigns, Finn Bálor and
Doc 2: At the historic WWE Royal Rumble 2018 special event, Shinsuke Nakamura won the Men's Royal Rumble Match and Asuka won the first-ever Women's
Doc 3: Shinsuke Nakamura wins the 2018 Royal Rumble Match: Royal Rumble 2018 (WWE Network Exclusive) · Featured Videos · WWE Superstar talk shows:
Doc 4: Shinsuke Nakamura had to get through John Cena AND Roman Reigns to claim victory in the 2018 Royal Rumble Match!
Doc 5: John Cena, Roman Reigns, Finn Bálor and Shinsuke Nakamura battle to win the 2018 Royal Rumble Match. WWE Network | Subscribe now: