A couple walks down a pedestrian street at night.
A dog and a cat are growling.
A couple usually refers to a human couple,  not two animals.
exists e1 s1 s2 x1 x2 x3.(at(e1,x3) & n_night(x3) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_street(x2) & a_pedestrian(s1) & Theme(s1,x2) & n_couple(x1))
exists e1 x1 x2 x3.(Actor(e1,x1) & v_growl(e1) & subset_of(x3,x1) & n_cat(x3) & subset_of(x2,x1) & n_dog(x2))