A man has shoveled snow from his driveway.
The man is shoveling sand.
Snow and sand are different elements.
exists e1 x1 x2 x3.(from(e1,x3) & n_driveway(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_shovel(e1) & n_snow(x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_shovel(e1) & n_sand(x2))