Four dogs are being walked by two owners.
Six mammals in motion.
Four dogs and two human owners as classed as mammals as mentioned in sentence 2 with six mammals
exists e1 x1 x2.(Actor(e1,x2) & n_owner(x2) & card_eq_2(x2) & Theme(e1,x1) & v_walk(e1) & n_dog(x1) & card_eq_4(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_motion(x2) & n_mammal(x1) & card_eq_6(x1))