Question: In addition to the Honorary President of the Institute for Jewish Policy Research, who else backs Viagogo?
Sentence (from "Jacob Rothschild, 4th Baron Rothschild"): Nathaniel Charles Jacob Rothschild, 4th Baron Rothschild, {'1': ", '2': ", '3': ", '4': "} (born 29 April 1936) is a British investment banker and a member of the prominent Rothschild banking family.
Relevant evidence: No