A dog running across a grassy field with a stick in its mouth.
A dog was scratching his ears while sitting.
Running and scratching are two different actions.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & with(e1,x4) & in(x4,x5) & n_mouth(x5) & of(x5,x1) & n_thing(x1) & n_stick(x4) & across(e1,x3) & n_field(x3) & a_grassy(s1) & Theme(s1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 e2 x1 x2.(while(e1,e2) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_scratch(e1) & n_ear(x2) & of(x2,x1) & n_male(x1) & n_dog(x1))