CREATE TABLE table_16166 ("Season" FLOAT, "Premier" TEXT, "Runner-up" TEXT, "Score" TEXT, "Margin" FLOAT, "Venue" TEXT, "Attendance" FLOAT)

who are all the runner-up for premier in richmond
SELECT "Runner-up" FROM table_16166 WHERE "Premier" = 'Richmond'
SELECT "Runner-up" FROM "table_16166" WHERE "Premier" = 'Richmond'