A man with a strange helmet is sitting on top of a blue motorcycle.
A helmeted man sits on a motorcycle.
Man with a strange helmet is a helmeted man, and a blue motorcycle is a type of motorcycle.
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x3) & of(x3,x4) & n_motorcycle(x4) & a_blue(s2) & Theme(s2,x4) & n_top(x3) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_helmet(x2) & a_strange(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_motorcycle(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_helmeted(s1) & Theme(s1,x1))