context: Nervander's career ended abruptly when he contracted smallpox and died March 15, 1848. At the time of his death he was only 43 years old. Nervander held the position of professor, director of the observatory, vacant housing at the observatory and the right to keep cattle in Kaisaniemi Park. His pedigree reveals that he had little cattle: a cow, a pig, and 12 chickens. Despite being in a good position, Nervander lived almost invariably all his life in scanty conditions. He enjoyed a good salary, but there was little extra, as the family included his wife, four children and a wife's sister. The household also included four maids. Nervander had big debts to pay off and borrowed more to pay off his previous loans. He left his family in poverty just as his father had left him in the past.
question: Where did Johan Jakob Nervander die?
answers.text: smallpox