Question: Who was the former mistress of Henry VIII of England, who gave birth to Thomas Burgh, 3rd Baron Burgh? 
Sentence (from "Thomas Burgh, 3rd Baron Burgh"): Thomas Burgh, 3rd Baron Burgh KG ("c." 1558–14 October 1597) 3rd Baron Borough of Gainsborough, "de jure" 7th Baron Strabolgi and 9th Baron Cobham of Sterborough was the son of William Burgh, 2nd Baron Burgh and Lady Katherine Clinton, daughter of Edward Clinton, 1st Earl of Lincoln and Elizabeth Blount, former mistress of King Henry VIII.
Relevant evidence: Yes