Question: What is the date of birth of Robert Petre, 9Th Baron Petre's father?
Sentence (from "Robert Petre, 8th Baron Petre"): Lord Petre was the son of Robert Petre, 7th Baron Petre (1689–1713) and his wife Catherine Walmesley (1697 – 31 January 1785), heiress of the Walmesley family of Lancashire.
Relevant evidence: No