Please answer the following question: Extract the answer to the question from the following context. Question: The six colonies that were self-govermened but formed by Britain are implied to have been created and occupied before which date? Context: In 1901, the Federation of Australia was the process by which the six separate British self-governing colonies of New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia formed one nation. They kept the systems of government that they had developed as separate colonies but also would have a federal government that was responsible for matters concerning the whole nation. When the Constitution of Australia came into force, the colonies collectively became states of the Commonwealth of Australia.
A:
1901