A man making cement risers.
A man working with cement outdoors.
cement risers doesn't imply  cement outdoors
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_make(e1) & n_riser(x3) & of(x3,x4) & n_cement(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & with(e1,x3) & n_outdoors(x3) & of(x3,x4) & n_cement(x4) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_man(x1))