a man is drilling in the side of a building.
The man is hammering a nail.
The man cannot be hammering and drilling at the same time.
exists e1 x1 x2 x3.(n_side(x2) & in(e1,x2) & of(x2,x3) & n_building(x3) & Actor(e1,x1) & v_drill(e1) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_hammer(e1) & n_nail(x2))