A bartender mixes drinks into two glasses.
A bartender washes the counter.
One cannot mixes drinks while washes the counter at the same time.
exists e1 x1 x2 x3.(into(e1,x3) & n_glass(x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_mix(e1) & n_drink(x2) & n_bartender(x1))
exists e1 x1 x2.(n_counter(x2) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & n_bartender(x1))