A child is performing a skateboard trick while another child with a skateboard leans on a wall.
Two children are learning how to do tricks on their skateboards.
Just because a child is performing a skateboard trick while another child with a skateboard leans on a wall does not mean they are learning how to do tricks.
exists e1 p1 x1 x2 x3.(exists e2 x4 x5 x6.(on(e2,x6) & n_wall(x6) & Actor(e2,x4) & v_lean(e2) & with(x4,x5) & n_skateboard(x5) & n_child(x4) & -(x4 = x1)) & n_child(x1) & n_child(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & of(x2,x3) & n_skateboard(x3))
exists e1 x1 x2 x5.(Topic(e1,x2) & Actor(e1,x1) & v_learn(e1) & n_manner(x2) & exists e2 x3 x4.(on(e2,x5) & Theme(e2,x4) & Actor(e2,x3) & v_do(e2) & n_trick(x4)) & n_skateboard(x5) & of(x5,x1) & n_thing(x1) & n_child(x1) & card_eq_2(x1))