The man is drinking beer while the other one eats chips.
The woman is drinking beer while the other one eats chips.
There can be either a man or a woman.
exists e1 p1 x1 x2.(-(x1 = x1) & n_thing(x1) & card_eq_1(x1) & n_man(x1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_eat(e2) & n_chip(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_beer(x2))
exists e1 p1 x1 x2.(-(x1 = x1) & n_thing(x1) & card_eq_1(x1) & n_woman(x1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_eat(e2) & n_chip(x3)) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_beer(x2))