A guy holds a bunch of grass.
A guy has collected some grass
Someone who holds a bunch of grass must have collected some grass.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & of(x2,x3) & n_grass(x3) & n_bunch(x2) & n_guy(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_collect(e1) & n_grass(x2) & n_guy(x1))