The man is training a dog to zigzag through poles.
the dog is a golden retriever
dog  doesn't always mean golden retriever
exists e1 p1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_train(e1) & Topic(x2,p1) & exists e2 x3.(through(e2,x3) & n_pole(x3) & Actor(e2,x2) & v_zigzag(e2)) & n_dog(x2))
exists p1 x1.(n_dog(x1) & exists s1 x2.((x1 = x2) & n_retriever(x2) & a_golden(s1) & Theme(s1,x2)))