A man sitting in a blue chair painting a man on a canvas.
A famous artist is painting
Just because the man is painting does not imply he's a famous artist.
exists e1 x1 x2.(a_topic(x1) & all x3.(n_man(x3) -> exists s1 x4 x5 x6.(on(e1,x6) & n_canvas(x6) & in(e1,x4) & for(x4,x3) & n_painting(x4) & of(x4,x5) & n_chair(x5) & a_blue(s1) & Theme(s1,x4))) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists p1 s1 x1.(exists x2.((x1 = x2) & n_painting(x2)) & n_artist(x1) & a_famous(s1) & Theme(s1,x1))