Question: The great grandson of the Liberal prime minister William Ewart Gladstone, and brother of Sir William Gladstone, competed in what event between Oxford University and Cambridge University on the River Thames?
Sentence (from "Sir John Gladstone, 3rd Baronet"): Sir John Robert Gladstone, 3rd Baronet (26 April 1852 – 25 June 1926) was the son of Sir Thomas Gladstone, an older brother of the Liberal Prime Minister William Ewart Gladstone, and Louisa Fellowes.
Relevant evidence: No