People are upside-down on a roller coaster.
People on a roller coaster have their hands up.
Not all people on a roller coaster have their hands up.
exists s1 x1 x2 x3.(on(s1,x2) & n_coaster(x2) & of(x2,x3) & n_roller(x3) & Theme(s1,x1) & a_upside-down(s1) & n_people(x1))
exists e1 s1 x1 x2 x3 x4.(a_up(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x1) & v_have(e1) & n_hand(x4) & of(x4,x1) & n_thing(x1) & on(x1,x2) & n_coaster(x2) & of(x2,x3) & n_roller(x3) & n_people(x1))