Two white dogs drink from the lake.
The dogs are digging holes.
The dogs cannot be drinking from the lake and digging holes simultaneously.
exists e1 s1 x1 x2.(n_lake(x2) & from(e1,x2) & Actor(e1,x1) & v_drink(e1) & n_dog(x1) & a_white(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_dig(e1) & n_hole(x2))