A backhoe is on top of a pile of rubble from a demolished building.
A piece of construction equipment at a construction site.
Backhoe are construction equipment.
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 x1 x2 x3 x4 x5.(a_topic(x1) & at(x1,x4) & n_site(x4) & of(x4,x5) & n_construction(x5) & of(x1,x2) & n_equipment(x2) & of(x2,x3) & n_construction(x3) & n_piece(x1))