A worker is on their hands and knees at a work site by a white fence.
The worker is working on a fence
fence almost the same as  fence
exists p1 s1 x1 x2 x3 x4 x5 x6 x7.(at(p1,x2) & by(x2,x4) & n_fence(x4) & a_white(s1) & Theme(s1,x4) & n_site(x2) & of(x2,x3) & n_work(x3) & on(x1,x5) & n_knee(x7) & n_hand(x6) & subset_of(x7,x5) & subset_of(x6,x5) & of(x5,x1) & n_thing(x1) & n_worker(x1))
exists e1 x1 x2.(n_worker(x1) & on(e1,x2) & n_fence(x2) & Actor(e1,x1) & v_work(e1))