A worker shredding pieces of wood.
There is a worker shredding wood
Shredding pieces of wood is a rephrasing of shredding wood.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_shred(e1) & of(x3,x4) & n_wood(x4) & n_piece(x3) & (x1 = x2) & n_worker(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_shred(e1) & n_wood(x4) & (x2 = x3) & n_worker(x2))