Two black dogs and one white dog interact.
The dogs are barking.
Just because the dogs are interacting doesn't mean they are barking, they could just be looking or sniffing.
exists s1 s2 s3 s4 x1 x2 x3.(n_interact(x2) & a_.(s4) & Theme(s4,x2) & of(x2,x3) & n_dog(x3) & a_white(s3) & Theme(s3,x2) & card_eq_1(x2) & n_dog(x1) & a_black(s2) & Theme(s2,x1) & card_eq_2(x1) & subset_of(x2,s1) & subset_of(x1,s1) & a_topic(s1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_bark(e1))