An artist working in a white room.
An artist is at work.
Artist who is at work is in a white room.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_room(x3) & a_white(s1) & Theme(s1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_artist(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_work(x2)) & n_artist(x1))