The two dogs are walking past each other on a beach
The dogs are napping on a bed.
The dogs napping on a bed contradict with the dogs walking on a beach in the first sentence.
exists e1 x1 x2.(n_dog(x1) & card_eq_2(x1) & on(e1,x2) & n_beach(x2) & all x3.(n_other(x3) -> past(e1,x3)) & Actor(e1,x1) & v_walk(e1))
exists e1 x1 x2.(n_dog(x1) & on(e1,x2) & n_bed(x2) & Actor(e1,x1) & v_nap(e1))