A worker working on a stone project.
A worker is taking a nap
Working is not done while taking a nap.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_project(x3) & of(x3,x4) & n_stone(x4) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_worker(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_nap(x2) & n_worker(x1))