Q: You are given the conttent of a table in the input (row by row). Generate an unambiguous question based on the information present in the table, such that: 1) It's answer is unique and is in the given table, 2) Its answer is a contiguous text span from the table. Avoid creating questions that can be answered correctly without reading/understanding the table
Table: ['Rank', 'Nation', 'Gold', 'Silver', 'Bronze', 'Total']. ['1', 'Japan', '5', '2', '0', '7']. ['2', 'China', '4', '3', '2', '9']. ['3', 'South Korea', '0', '3', '1', '4']. ['4', 'North Korea', '0', '1', '0', '1']. ['5', 'Chinese Taipei', '0', '0', '3', '3']. ['5', 'Thailand', '0', '0', '3', '3']. ['Total', 'Total', '9', '9', '9', '27']
A:
which nations participated?