A skateboarder grinding a lip.
A skateboarder is outside.
You can not infer the person is outside.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & n_lip(x3) & (x1 = x2) & n_skateboarder(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_skateboarder(x1))