Which twins were known collectively as the Dioscuri?

Castor and Pollux

Which board game involves guessing a person by asking yes or no questions about character attributes? Which sauce, traditionally green, originates from Argentina and often accompanies grilled meats? What French city served as the seat of the papacy during the 14th century? Which deadly Marvel assassin is part of the X-Force team and known as Wade Wilson? What is the shape of the graph of a quadratic equation?