Three persons are riding skateboards on a curvy road, wearing helmets and protective gears.
They are outside.
Being on a curvy road means they're outside.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6 x7.(on(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_wear(e2) & subset_of(x7,x5) & n_gear(x7) & a_protective(s2) & Theme(s2,x7) & subset_of(x6,x5) & n_helmet(x6) & (x3 = x4) & n_road(x3) & a_curvy(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_skateboard(x2) & n_person(x1) & card_eq_3(x1))
exists s1 x1.(n_thing(x1) & Theme(s1,x1) & a_outside(s1))