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: "when was lead based paint banned in canada?" whose answer is 1976.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was lead-based paint banned in canada
Useful Output:

Doc 1: Health Canada's website said: “If built between 1960 and 1990, the exterior may contain lead-based paint but paint on interior surfaces should
Doc 2: Since 1990, the use of leaded gasoline in motor vehicles has been prohibited in Canada, under the Canadian Environmental Protection Act (CEPA).
Doc 3: Even though lead-based paint was no longer used to paint the interiors of homes after 1960, it was still commonly used to paint exteriors up
Doc 4:  lead-based paint. Lead in paint was reduced to very low levels by the 1960s and was severely limited by 1976. Lead-based paint does not pose
Doc 5: Although banned in Canada in 1976 and in the United States in 1978, lead paint remains present in many older houses.