Two men are challenging each other in a medieval dual.
two people are fighting
a medieval dual is fighting.
exists x1.(all x2.(n_other(x2) -> exists e1 s1 x3.(in(e1,x3) & n_medieval(x3) & a_dual(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_challenge(e1))) & n_man(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_fight(e1) & n_people(x1) & card_eq_2(x1))