A group of men in red and black jackets waits on motorcycles.
A group of people wait on black motorcycles.
Just because they are wearing black jackets does it mean that they have black motorcyles.
exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & in(x2,x3) & on(x3,x5) & n_motorcycle(x5) & n_wait(x3) & of(x3,x4) & n_jacket(x4) & a_black(s2) & Theme(s2,x3) & a_red(s1) & Theme(s1,x3) & n_man(x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_motorcycle(x3) & a_black(s1) & Theme(s1,x3) & Actor(e1,x1) & v_wait(e1) & of(x1,x2) & n_people(x2) & n_group(x1))