Dog training on the mountain
A dog is taking a class.
Just because a dog or someone is doing training somewhere doesn't mean they are actively taking a class.
exists x1 x2 x3.(n_mountain(x3) & a_topic(x1) & on(x1,x3) & n_training(x1) & (x1 = x2) & ne_nam_dog(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_class(x2) & n_dog(x1))