Two men are sitting indoors, one of them has headphones.
One man has headphones.
The number of men with headphones is one.
exists p1 x1.(exists e1 p2 x2.((x1 = x2) & exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_have(e2) & n_headphone(x4) & of(x3,x1) & n_thing(x3) & card_eq_1(x3)) & that(x2,p2) & n_indoor(x2) & Actor(e1,x2) & v_sit(e1)) & n_thing(x1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_headphone(x2) & n_man(x1) & card_eq_1(x1))