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 won the 2018 indianapolis 500 race today?" whose answer is Will Power.
Each document should contain about 30 words, and these documents should contain useful information.

Query: most recent winner of indy 500
Useful Output:

Doc 1: The winner of the 106th Running of the Indianapolis 500, Marcus Ericsson, joins Doug and Drivers to talk to IMS and INDYCAR President Doug Boles
Doc 2: Josef Newgarden ended 11 years of frustration and finally won the Indianapolis 500 on Sunday to extend team owner Roger Penske's record to 19 victories.
Doc 3: American drivers A.J. Foyt and Al Unser and Brazilian driver Hélio Castroneves have won the race four times each. Indianapolis 500. year, winner
Doc 4: Helio Castroneves, who was the last to win back-to-back Indy 500s in 2001 and 2002, finished 20th. It was the 20th Indy 500 win for team owner Roger Penske.
Doc 5: Josef Newgarden accomplished the feat with an amazing last-lap pass that capped a wild day Sunday in Indianapolis, where storms delayed the start by four hours.