Is elizabeth 2 the mother of Prince Charles?

Is Elizabeth II, the reigning queen of 16 independent sovereign states known as the Commonwealth realms: the United Kingdom, Canada, Australia, New Zealand, Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu currently the biological mother of The Prince Charles, Prince of Wales, (Charles Philip Arthur George; born 14 November 1948), the eldest child of Queen Elizabeth II and Prince Philip, Duke of Edinburgh?

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I followed this chain of reasoning:

By calculation (generator: ["now@trueknowledge.com"]) I know that:
The current time is May 21st 2013, 21:40:50

I know from locally stored knowledge that:
Elizabeth II is a parent of Prince Charles ([fact: ["1149519@trueknowledge.com"]])

female applies to Elizabeth II ([fact: ["1131842@trueknowledge.com"]])

By calculation (generator: ["mother1@trueknowledge.com"]) I know that:
Fact 1: Elizabeth II is the mother of Prince Charles

Fact 1 is true for all time

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:
Fact 1 is true at May 21st 2013, 21:40:50

I used the following facts to provide this answer:

Elizabeth II is a parent of Prince Charles

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Elizabeth II is female

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