Task: Question Answering
Input (English): passage: Walmart is the world's largest company by revenue--over US$500 billion, according to Fortune Global 500 list in 2018--as well as the largest private employer in the world with 2.3 million employees. It is a publicly traded family-owned business, as the company is controlled by the Walton family. Sam Walton's heirs own over 50 percent of Walmart through their holding company, Walton Enterprises, and through their individual holdings. Walmart was the largest U.S. grocery retailer in 2016, and 62.3 percent of Walmart's US$478.614 billion sales came from U.S. operations.
 question: is walmart the largest retailer in the world?
Output (English): Yes