Question: Who was the recipient of Frédéric's letter he wrote on 12 December 1831?
Sentence: Although it is not known exactly when Chopin first met Liszt after arriving in Paris, on 12 December 1831 he mentioned in a letter to his friend Woyciechowski that "I have met Rossini, Cherubini, Baillot, etc.—also Kalkbrenner.
Answer in sentence: yes