A group of people display ribbons won by their dogs.
The people in the group all own dogs
Group of people by their dogs is mentioned in both sentences
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x3) & Actor(e2,x1) & v_display(e2) & Actor(e1,x5) & n_dog(x5) & of(x5,x1) & n_thing(x1) & Theme(e1,x4) & v_win(e1) & (x3 = x4) & n_ribbon(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 x1 x2 x3.(n_dog(x2) & a_own(s1) & Theme(s1,x2) & of(x2,x3) & n_group(x3) & n_people(x1) & a_topic(x1) & in(x1,x2))