Two yellow dogs run together in green grass.
Two birds sing.
They are either birds or dogs. You cannot sing while running.
exists e1 s1 s2 s3 x1 x2.(a_together(s3) & Manner(e1,s3) & in(e1,x2) & n_grass(x2) & a_green(s2) & Theme(s2,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_yellow(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_sing(e1) & n_bird(x1) & card_eq_2(x1))