Man in a green shirt waving while walking.
a person is walking and waving.
Just because a man is in a green shirt doesn't mean he is walking and waving.
exists e1 e2 s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & while(e1,e2) & Actor(e2,x3) & v_walk(e2) & Actor(e1,x3) & v_wave(e1) & (x2 = x3) & n_shirt(x2) & a_green(s1) & Theme(s1,x2) & n_man(x1))
exists e2 e1 x1 x2.(Actor(e2,x2) & v_wave(e2) & n_person(x2) & Actor(e1,x1) & v_walk(e1) & n_person(x1))