A child skis across the snowy ground.
A child learning how to ski.
A child must learn how to ski before he skis across the ground.
exists e1 s1 x1 x2.(n_ground(x2) & a_snowy(s1) & Theme(s1,x2) & across(e1,x2) & Actor(e1,x1) & v_ski(e1) & n_child(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Topic(e1,x3) & Actor(e1,x2) & v_learn(e1) & n_manner(x3) & exists e2 x4.(Actor(e2,x4) & v_ski(e2)) & (x1 = x2) & n_child(x1))