How old was Donald Coggan when jfk was born?

What was the age (length of time since creation) of Frederick Donald Coggan, Baron Coggan (23 December, 1909 – 17 May, 2000), the 101st Archbishop of Canterbury from 1974 to 1980, during which time he visited Rome and met the Pontiff, in company with Bishop Cormac Murphy-O'Connor at the time John F. Kennedy (1917-1963), the American politician 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:
May 29th 1917 is the birthdate of John F. Kennedy ([fact: ["18362746@trueknowledge.com"]])

October 9th 1909 is the birthdate of Donald Coggan ([fact: ["848349088@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 7 years, 7 months and 20 days old is the age of Donald Coggan

Fact 1 is true at May 29th 1917

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at May 1917

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 7 years, 7 months and 20 days old is a age

Fact 1: 7 years, 7 months and 20 days old applies to Donald Coggan

Fact 1 is true at May 29th 1917

I know from locally stored knowledge that:
December 23rd 1909 is the birthdate of Donald Coggan ([fact: ["137777659@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 7 years, 5 months and 6 days old is the age of Donald Coggan

Fact 1 is true at May 29th 1917

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at May 1917

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 7 years, 5 months and 6 days old is a age

Fact 1: 7 years, 5 months and 6 days old applies to Donald Coggan

Fact 1 is true at May 29th 1917

By calculation (generator: ["ismoreaccurate1@trueknowledge.com"]) I know that:
May 29th 1917 is a more accurate version of May 1917

I used the following facts to provide this answer:

May 29th 1917 is the birthdate of John F. Kennedy

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October 9th 1909 is the birthdate of Donald Coggan

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December 23rd 1909 is the birthdate of Donald Coggan

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