The skateboarder is wearing a helmet.
A skateboarder is getting ready to leave.
Just because a skateboarder is wearing a helmet it does not mean they are getting ready to leave.
exists e1 x1 x2.(n_skateboarder(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2))
exists e1 p1 x1.(exists p2 s1.(Topic(s1,p2) & Actor(s1,x1) & a_ready(s1) & exists e2.(Actor(e2,x1) & v_leave(e2))) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & n_skateboarder(x1))