A young boy is sitting on the grass.
A young boy is sitting outside
Sitting on the grass implies sitting outside.
exists e1 s1 x1 x2.(n_grass(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 p1 s1 x1.(exists s2.(Theme(s2,x1) & a_outside(s2)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))