Claim: Figures of Argentine tango, which can be grouped into eight categories, include sticking with a parallel system during dances.
Evidence: Figures of Argentine tango are elements of Argentine tango. On the basis of several instructional tango books published between 1911–1925 early tango figures can be grouped into eight categories: corte, paseo, la marcha, ocho, grapevine, ruedas, media luna, molinette. Walking in a parallel system is defined as the couple stepping simultaneously with the leader's right and follower's left leg, and then with the leader's left and the follower's right leg.