A male rides a skateboard in the road.
The male is a pro at skateboarding.
Riding a skateboard in the road doesn't make you a pro.
exists e1 x1 x2 x3.(n_road(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_skateboard(x2) & n_male(x1))
exists p1 x1.(n_male(x1) & exists x2 x3.((x1 = x2) & at(x2,x3) & n_skateboarding(x3) & n_pro(x2)))