Man with a T-shirt and helmet sitting on top of a motorcycle.
The man has a helmet
Just because he has a helmet doesn't mean he could be wearing it.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x2) & on(e1,x4) & of(x4,x5) & n_motorcycle(x5) & n_top(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_helmet(x2) & a_t-shirt(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_helmet(x2))