A man in all black is using a green bike to trick over a sign saying, "Free Dinner".
A human on a bike.
a man is using a green bike simply means human on a bike
exists s2 x1 x5 x6.(ne_org_dinner(x5) & (x5 = x6) & ne_org_free(x6) & a_,(s2) & Theme(s2,x5) & all x2.(n_black(x2) -> exists e1 p1 s1 x3.(Theme(e1,p1) & Recipient(e1,x3) & Actor(e1,x1) & v_use(e1) & exists e2 e3 x4.(for(e2,e3) & Theme(e3,x5) & Actor(e3,x1) & v_say(e3) & over(e2,x4) & n_sign(x4) & Actor(e2,x1) & v_trick(e2)) & n_bike(x3) & a_green(s1) & Theme(s1,x3) & in(x1,x2))) & n_man(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bike(x2) & n_human(x1))