CREATE TABLE table_38857 ("System" TEXT, "Owner" TEXT, "Quantity" FLOAT, "Delivery" TEXT, "Length" TEXT, "Gauge" TEXT, "Operation" TEXT, "Seats" FLOAT, "Standing" FLOAT)

Which owner has 84 seats?
SELECT "Owner" FROM table_38857 WHERE "Seats" = '84'
SELECT "Owner" FROM "table_38857" WHERE "Seats" = '84'