In 1947 she testified before the house un-american activities committee on how the film song of russia was communist propaganda who is this witness?

Ayn Rand is the witness.

Explanation:

Ayn Rand was the writer and philosopher who got criticized by un-american activities committee for supporting the film ‘Song of Russia’. This film was in controversy for propagating Soviet Russia. The writer and philosopher Russian- American Ayn Rand supports the film.

And asked by the HUAC investigator to see the film and give her opinion on it. She gave a positive opinion on that and got criticized by the Russian government. In fact, the lead star of the film ‘Song of Russia’ himself protested about the film.

yes, obviously. that violates r@pe and p*dophilia laws, which are some pretty serious laws if you ask me.