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Facts that happened are historical facts.
facts about accountants are facts about accountants
Biographical facts are facts about a certain person.
Some good sentences for facts are:
You should get all the facts before making a decision.
Math facts are fun to learn.
The facts show that the earth is round.
Facts are not opinions.
There are number of websites that carry weird facts about bugs. One can find such facts on websites such as 'Sweet Facts', 'Bug Facts' and 'HubPages'.