The artist paints a picture of a beautiful building during the winter.
An artist is painting.
A person who paints a picture obviously is engaged in painting.
exists e1 s1 x1 x2 x3 x4.(n_winter(x4) & n_artist(x1) & during(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & of(x2,x3) & n_building(x3) & a_beautiful(s1) & Theme(s1,x3) & n_picture(x2))
exists p1 x1.(exists x2.((x1 = x2) & n_painting(x2)) & n_artist(x1))