An electrician is working to install wires upon a pole on a roof.
Someone was outside working on a roof.
" Someone " is a more concise and general way of saying " an electrician "
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_work(e1) & exists e2 x2 x3 x4.(on(e2,x4) & n_roof(x4) & upon(e2,x3) & n_pole(x3) & Theme(e2,x2) & Actor(e2,x1) & v_install(e2) & n_wire(x2)) & n_electrician(x1))
exists e1 s1 x1 x2.(for(s1,e1) & on(e1,x2) & n_roof(x2) & Actor(e1,x1) & v_work(e1) & Theme(s1,x1) & a_outside(s1) & n_person(x1))