Two black dogs and one white dog interact.
There are a group of dogs together.
"A group of dogs" is a rephrasing of "two black dogs and one white dog."
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 p1 s1 x1.(a_together(s1) & Manner(p1,s1) & exists x2 x3.((x1 = x2) & of(x2,x3) & n_dog(x3) & n_group(x2)))