The Mastif playfully pins the German Shepherd in the grass.
The dogs are outside.
Just because the dogs are in the grass does not mean the dogs are outside.
exists e1 s1 s2 x1 x2 x3.(n_grass(x3) & ne_org_shepherd(x2) & a_german(s1) & Theme(s1,x2) & ne_org_mastif(x1) & in(e1,x3) & a_playfully(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_pin(e1))
exists s1 x1.(n_dog(x1) & Theme(s1,x1) & a_outside(s1))