An artist is painting a mural on the side of a building.
An artist is working outside.
The artist in both sentences is working outside, while the first sentence tells us they are specifically working on a painting.
exists e1 x1 x2 x3 x4.(n_side(x3) & Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & on(x2,x3) & of(x3,x4) & n_building(x4) & n_mural(x2) & n_artist(x1))
exists e1 s1 x1.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_artist(x1))