Boys and men, mostly all wearing helmets, hang on to two separate cars while they ride skateboards.
Some people are skateboarding on a city street.
The boys and men hanging on does not imply the skateboarders are on a city street.
exists e1 p1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(rel(e1,x5) & subset_of(x7,x5) & n_man(x7) & subset_of(x6,x5) & n_boy(x6) & exists e2 x8.(Theme(e2,x8) & Actor(e2,x1) & v_ride(e2) & n_skateboard(x8)) & n_thing(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & rel(x2,x3) & on(x3,x4) & n_car(x4) & a_separate(s2) & Theme(s2,x4) & card_eq_2(x4) & r_to(x4) & n_hang(x3) & n_helmet(x2) & n_all(x1) & a_mostly(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_street(x2) & of(x2,x3) & n_city(x3) & Actor(e1,x1) & v_skateboard(e1) & n_people(x1))