CREATE TABLE table_73991 ("Edition" TEXT, "Year" FLOAT, "Host city" TEXT, "Host country" TEXT, "Date" TEXT, "No. of athletes" TEXT, "Nations" FLOAT)

What was the number of athletes in the host city of Nice?
SELECT "No. of athletes" FROM table_73991 WHERE "Host city" = 'Nice'
SELECT "No. of athletes" FROM "table_73991" WHERE "Host city" = 'Nice'