A bartender wearing a hat is pouring a drink.
A bartender is cooking a steak on the grill.
The bartender is either pouring a drink or cooking a steak, not both.
exists e2 e1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_pour(e2) & n_drink(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & (x1 = x2) & n_bartender(x1))
exists e1 x1 x2 x3.(n_grill(x3) & Theme(e1,x2) & Actor(e1,x1) & v_cook(e1) & on(x2,x3) & n_steak(x2) & n_bartender(x1))