Question: Samuel Robson "Rob" Walton, born on which date, is an American businessman and is the eldest son of Helen Robson Kemper Walton, the wife of Wal-Mart founder Sam Walton, the world's largest retailer?
Sentence (from "Helen Walton"): At one point in her life, she was the richest American and the eleventh-richest woman in the world.
Relevant evidence: No