A bartender mixes drinks into two glasses.
A bartender is working.
If a bartender mixes drinks, they are working.
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.(Actor(e1,x1) & v_work(e1) & n_bartender(x1))