  Let $E / \mathbb{Q}$ and $A / \mathbb{Q}$ be elliptic curves. We can
construct modular points derived from $A$ via the modular parametrisation of
$E$. With certain assumptions we can show that these points are of infinite
order and are not divisible by a prime $p$. In particular, using Kolyvagin's
construction of derivative classes, we can find elements in certain
Shafarevich-Tate groups of order $p^{n}$.
