Two people digging a hole while one looks on.
Someone watches two others dig a hole.
One person or someone is watching two other people dig.
exists e1 e2 x1 x2 x3 x4 x5.(on(e2,x5) & n_thing(x5) & Actor(e2,x1) & v_look(e2) & while(e1,x4) & n_thing(x4) & card_eq_1(x4) & Theme(e1,x3) & Actor(e1,x2) & v_dig(e1) & n_hole(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(a_topic(x1) & exists e1 x2 x3.(Theme(e1,x3) & Actor(e1,x2) & v_dig(e1) & n_hole(x3) & -(x2 = x1) & n_person(x2) & card_eq_2(x2)) & n_person(x1) & that(x1,p1) & n_watch(x1))