How old was David Cameron when Elio Di Rupo was born?

What was the age (length of time since creation) of David William Donald Cameron (born 9 October 1966), the Prime Minister of the United Kingdom, First Lord of the Treasury, Minister for the Civil Service and Leader of the Conservative Party at the time Elio Di Rupo (born 18 July 1951 in Morlanwelz), the Belgian social-democratic politician and the President of the francophone Socialist Party is born on (has as his or her date of birth)?

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Show reasoning Reasoning

I followed this chain of reasoning:

I know from locally stored knowledge that:
July 18th 1951 is the birthdate of Elio Di Rupo ([fact: ["18343725@trueknowledge.com"]])

October 9th 1966 is the birthdate of David Cameron ([fact: ["1157526@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: -15 years, 2 months and 21 days old is the age of David Cameron

Fact 1 is true at July 18th 1951

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at July 1951

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: -15 years, 2 months and 21 days old is a age

Fact 1: -15 years, 2 months and 21 days old applies to David Cameron

Fact 1 is true at July 18th 1951

By calculation (generator: ["ismoreaccurate1@trueknowledge.com"]) I know that:
July 18th 1951 is a more accurate version of July 1951

I used the following facts to provide this answer:

July 18th 1951 is the birthdate of Elio Di Rupo

agree disagree edit

October 9th 1966 is the birthdate of David Cameron

agree disagree edit