Two people ride together on a black motorcycle.
Two people rideing together in a motorcycle
Two people are riding on a motorcycle which just happens to be black in color.
exists e1 s1 s2 x1 x2.(on(e1,x2) & n_motorcycle(x2) & a_black(s2) & Theme(s2,x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_ride(e1) & n_people(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_motorcycle(x3) & exists s1.(Theme(s1,x2) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_ridee(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))