How old was Constance of Penafiel when Juan Manuel, Prince of Villena died?

What was the age (length of time since creation) of Constance of Peñafiel or Constance Manuel of Castile (b. 1315-1323, d. November 13, 1345), the daughter of Juan Manuel, Duke of Peñafiel (1282-1348), called "el escritor" (the writer), Duke of Peñafiel, and his second wife Constance of Aragon at the time Juan Manuel, Prince of Villena (5 May 1282 – 13 June 1348), the Spanish medieval writer, nephew of Alfonso X of Castile, son of Juan Manuel, Lord of Villena and Beatrice of Savoy is someone who died on?

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I followed this chain of reasoning:

I know from locally stored knowledge that:
1349 is the date of death of Juan Manuel, Prince of Villena ([fact: ["1051709674@trueknowledge.com"]])

1282 is the birthdate of Constance of Penafiel ([fact: ["124185060@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 67 years old is the age of Constance of Penafiel

Fact 1 is true at 1349

Fact 1: 67 years old is a age

Fact 1: 67 years old applies to Constance of Penafiel

Fact 1 is true at 1349

I used the following facts to provide this answer:

1349 is the date of death of Juan Manuel, Prince of Villena

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1282 is the birthdate of Constance of Penafiel

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