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: "In what year was the physicist who introduced the 't Hooft operator born?" whose answer is 1946.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Gerard 't Hooft birth year
Useful Output:

Doc 1: Gerardus 't Hooft is a particle physicist at Utrecht University. He was awarded the 1999 Nobel Prize in Physics along with Martinus JG Veltman.
Doc 2: Gerardus (Gerard) 't Hooft (Dutch: [%CB%8C%C9%A3%C9%AA%CB%90r%C9%91rt ət ˈɦoːft]; born July 5, 1946) is a Dutch theoretical physicist and
Doc 3: Gerard 't Hooft was born in Den Helder on July 5, 1946, into a family of scholars. The middle child in a family with three children, he grew up
Doc 4: Gerard 't Hooft (b. 5 July 1946) was born in Den Helder, The Netherlands. He majored in Physics and Mathematics at Utrecht University,
Doc 5: Gerard 't Hooft, a distinguished Dutch theoretical physicist, was born on July 5, 1946, in Den Helder, Netherlands, but grew up in The Hague.