CREATE TABLE table_3143 ("Result" TEXT, "Date" TEXT, "Race" TEXT, "Venue" TEXT, "Group" TEXT, "Distance" TEXT, "Weight" TEXT, "Jockey" TEXT, "Winner/2nd" TEXT)

What was the group in the British Champion Stakes?
SELECT "Group" FROM table_3143 WHERE "Race" = 'British Champion Stakes'
SELECT "Group" FROM "table_3143" WHERE "Race" = 'British Champion Stakes'