Question: Jo Lynn "Jody" Allen is the sister of which American business magnate, investor and philanthropist?
Sentence (from "Warren Buffett"): He is considered by some to be one of the most successful investors in the world, and as of August 2017 is the second wealthiest person in the United States, and the fourth wealthiest in the world, with a total net worth of $76.9 billion.
Relevant evidence: No