A young skateboarder on a ramp.
A young person is learning how to swim.
A skateboarder on a ramp is not likely to be learning to swim.
exists s1 x1 x2.(a_topic(x1) & on(x1,x2) & n_ramp(x2) & n_skateboarder(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_manner(x2) & exists e2 x3.(Actor(e2,x3) & v_swim(e2)) & n_person(x1) & a_young(s1) & Theme(s1,x1))