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 is the most expensive van gogh painting?" whose answer is Portrait of Dr. Gachet.
Each document should contain about 30 words, and these documents should contain useful information.

Query: most expensive van gogh painting
Useful Output:

Doc 1: The most expensive Van Gogh painting ever sold for $117M: Van Gogh's Orchard with Cypresses (Verger avec cyprès) (April 1888) © Christie's
Doc 2: Sold in 1990 for a whopping $83 million, Portrait of Dr Paul Gachet, painted in 1890, is the most expensive Van Gogh painting. This Van Gogh
Doc 3: Sous-bois, a $24,5 million worth artwork, represents one of the very last paintings that acclaimed Dutch impressionist ever made. The painting
Doc 4: The first is the most expensive, which sold for $82.5 million to Ryoei Saito in 1990, which is $171.1 million in 2022 money.
Doc 5: Vincent Van Gogh is among the most iconic Dutch painters in history. His paintings have fetched fortunes at auctions throughout the world.