Input: Article: The creation of a unified German Empire ended the balance of power that had been created with the Congress of Vienna after the end of the Napoleonic Wars. Germany had established itself as the main power in continental Europe with the most powerful and professional army in the world.[citation needed] Although Great Britain remained the dominant world power, British involvement in European affairs during the late 19th century was very limited, allowing Germany to exercise great influence over the European mainland.[citation needed] Besides, the Crown Prince's marriage with the daughter of Queen Victoria was only the most prominent of several German–British relationships.

Now answer this question: At the end of the Napoleonic wars, Germany had established itself as what, in continental Europe?

Output: the main power

Input: Article: This annexation was one of the direct causes of the brief and bloody War of the Reunions whose outcome left the French in possession. The French annexation was recognized by the Treaty of Ryswick (1697). The official policy of religious intolerance which drove most Protestants from France after the revocation of the Edict of Nantes in 1685 was not applied in Strasbourg and in Alsace, because both had a special status as a province à l'instar de l'étranger effectif (a kind of foreign province of the king of France). Strasbourg Cathedral, however, was taken from the Lutherans to be returned to the Catholics as the French authorities tried to promote Catholicism wherever they could (some other historic churches remained in Protestant hands). Its language also remained overwhelmingly German: the German Lutheran university persisted until the French Revolution. Famous students included Goethe and Herder.

Now answer this question: When was the French annexation recognized by the Treaty of Ryswick?

Output: 1697

Input: Article: In 1827, soon after the death of Chopin's youngest sister Emilia, the family moved from the Warsaw University building, adjacent to the Kazimierz Palace, to lodgings just across the street from the university, in the south annex of the Krasiński Palace on Krakowskie Przedmieście,[n 5] where Chopin lived until he left Warsaw in 1830.[n 6] Here his parents continued running their boarding house for male students; the Chopin Family Parlour (Salonik Chopinów) became a museum in the 20th century. In 1829 the artist Ambroży Mieroszewski executed a set of portraits of Chopin family members, including the first known portrait of the composer.[n 7]

Now answer this question: What was the Chopin family's business?

Output:
boarding house for male students