How many Sports games did Nintendo publish?
Sports games refers to game_name WHERE genre_name = 'Sports'; Nintendo refers to publisher_name = 'Nintendo';
SELECT COUNT(T3.id) FROM publisher AS T1 INNER JOIN game_publisher AS T2 ON T1.id = T2.publisher_id INNER JOIN game AS T3 ON T2.game_id = T3.id INNER JOIN genre AS T4 ON T3.genre_id = T4.id WHERE T4.genre_name = 'Sports' AND T1.publisher_name = 'Nintendo'