Workers are sorting fishing line.
Workers are sorting their knives by size and sharpness.
A fishing line isn't knives.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_sort(e1) & n_line(x2) & of(x2,x3) & n_fishing(x3) & n_worker(x1))
exists e1 x1 x2 x3 x4 x5.(by(e1,x3) & n_sharpness(x5) & n_size(x4) & subset_of(x5,x3) & subset_of(x4,x3) & Theme(e1,x2) & Actor(e1,x1) & v_sort(e1) & n_knife(x2) & of(x2,x1) & n_thing(x1) & n_worker(x1))