A backhoe is on top of a pile of rubble from a demolished building.
A backhoe stops for lunch after demolishing a building.
Just because  A backhoe is on top of a pile of rubble from a demolished building does not mean it stops for lunch after.
exists p1 x1.(exists s1 x2 x3 x4 x5.(on(x1,x2) & of(x2,x3) & of(x3,x4) & from(x4,x5) & n_building(x5) & a_demolished(s1) & Theme(s1,x5) & n_rubble(x4) & n_pile(x3) & n_top(x2)) & n_backhoe(x1))
exists e2 e1 x1 x2 x3.(after(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_demolish(e2) & n_building(x3) & for(e1,x2) & n_lunch(x2) & Actor(e1,x1) & v_stop(e1) & n_backhoe(x1))