A construction worker does some grinding on a piece of iron.
The construction worker eats his sandwich.
Grinding iron is usually not done while a worker eats his sandwich.
exists e2 e1 x1 x2 x3 x4 x5.(for(e1,e2) & on(e2,x4) & of(x4,x5) & n_iron(x5) & n_piece(x4) & Actor(e2,x1) & v_grind(e2) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_thing(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2 x3.(n_sandwich(x3) & of(x3,x1) & n_male(x1) & n_worker(x1) & of(x1,x2) & n_construction(x2) & Theme(e1,x3) & Actor(e1,x1) & v_eat(e1))