I want to know the answer to the following question:
Who was the host of the gathering where Frédéric was introduced to George Sand?
All the background I'm provided with is that "In 1836, at a party hosted by Marie d'Agoult, Chopin met the French author George Sand (born [Amantine] Aurore [Lucile] Dupin).". Is that enough to answer the question?
Answer: yes