generate questions: Although this period had been productive, the bad weather had such a detrimental effect on Chopin's health that Sand determined to leave the island. To avoid further customs duties, Sand sold the piano to a local French couple, the Canuts.[n 8] The group traveled first to Barcelona, then to Marseilles, where they stayed for a few months while Chopin convalesced. In May 1839 they headed for the summer to Sand's estate at Nohant, where they spent most summers until 1846. In autumn they returned to Paris, where Chopin's apartment at 5 rue Tronchet was close to Sand's rented accommodation at the rue Pigalle. He frequently visited Sand in the evenings, but both retained some independence. In 1842 he and Sand moved to the Square d'Orléans, living in adjacent buildings.
What is stated as having a negative effect on Frédéric's health during this productive time? {sep_token} What culture of French people did Sand sell the piano to? {sep_token} What city did the group travel to in order to help Frédéric recover? {sep_token} Where was Sand's estate located where they stayed for the summers until 1846? {sep_token} Where did Frédéric and Sand move to in 1842 in buildings next to each other? {sep_token} Who did Sand sell Chopin's piano to? {sep_token} Where did the group travel to after Barcelona? {sep_token} Where was Sand's home? {sep_token} After returning to Paris where was Chopin's apartment? {sep_token} In 1842 where did Chopin and Sand move? {sep_token} What had a negative effect on Chopin's health? {sep_token} Who did Sand sell the piano to? {sep_token} Where did they travel after leaving Barcelona? {sep_token} Where did Chopin and Sand move to in 1842? {sep_token} Where did they spend most summers until 1846?