Africans in tribe clothes, walking pass a green.
Africans are shooting guns at a bear.
Shooting and walking are different.
exists e1 p1 x1 x2 x3.(ne_nam_africans(x1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x1) & v_pass(e2) & n_green(x4)) & Topic(e1,p1) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_clothes(x2) & of(x2,x3) & n_tribe(x3))
exists e1 x1 x2 x3.(ne_nam_africans(x1) & at(e1,x3) & n_bear(x3) & Theme(e1,x2) & Actor(e1,x1) & v_shoot(e1) & n_gun(x2))