Tan dog chasing a ball.
There are no dogs playing outside.
One dog is not the same as no dog.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_chase(e1) & n_ball(x4) & (x1 = x3) & n_dog(x1) & (x1 = x2) & ne_per_tan(x2))
exists p1 x1.-exists e1 s1 x2 x3.((x1 = x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_dog(x2))