Which libra person was the son of Robert Walpole?

Which human (Humans, primates of the family Hominidae, and the only living species of the genus Homo) who has the attribute Libra, the sign of the zodiac for the dates Sept 23 - Oct 22 was a son (male child) of Robert Walpole, 1st Earl of Orford, KG, KB, PC (26 August 1676 – 18 March 1745), known before 1742 as Sir Robert Walpole, the British statesman who is generally regarded as the first Prime Minister of Great Britain?

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I followed this chain of reasoning:

I know from locally stored knowledge that:
Horace Walpole is a child of Robert Walpole ([fact: ["147307873@trueknowledge.com"]])

male applies to Horace Walpole ([fact: ["19810475@trueknowledge.com"]])

By calculation (generator: ["son1@trueknowledge.com"]) I know that:
Fact 1: Horace Walpole is a son of Robert Walpole

Fact 1 is true for all time

I used the following facts to provide this answer:

Horace Walpole is a child of Robert Walpole

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Horace Walpole is male

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