  Motivated by the results of C. Macchiavello and G. M. Palma on
entanglement-enhanced information transmission over a quantum channel with
correlated noise, we demonstrate how the entanglement teleportation scheme of
J. Lee and M. S. Kim gives rise to two uncorrelated generalized depolarizing
channels. In an attempt to find a teleportation scheme which yields two
correlated generalized depolarizing channels, we discover a novel teleportation
scheme, which allows one to learn about the entanglement in an entangled pure
input state, but without decreasing the amount of entanglement associated with
it.
