This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Example Input: Passage: The most famous reformer of Estonian, Johannes Aavik (1880–1973), used creations ex nihilo (cf. ‘free constructions’, Tauli 1977), along with other sources of lexical enrichment such as derivations, compositions and loanwords (often from Finnish; cf. Saareste and Raun 1965: 76). In Aavik’s dictionary (1921), which lists approximately 4000 words, there are many words which were (allegedly) created ex nihilo, many of which are in common use today. Examples are Question: Of all of Estonian's language reformers who is the most well known?
Example Output: Johannes Aavik

Example Input: Passage: While most of mainland Greece and the Aegean islands was under Ottoman control by the end of the 15th century, Cyprus and Crete remained Venetian territory and did not fall to the Ottomans until 1571 and 1670 respectively. The only part of the Greek-speaking world that escaped long-term Ottoman rule was the Ionian Islands, which remained Venetian until their capture by the First French Republic in 1797, then passed to the United Kingdom in 1809 until their unification with Greece in 1864.[page needed] Question: The Ottomans controlled what islands b y the end of the 15th century?
Example Output: Aegean islands

Example Input: Passage: As of 1878, there were only three free Slavic states in the world: the Russian Empire, Serbia and Montenegro. Bulgaria was also free but was de jure vassal to the Ottoman Empire until official independence was declared in 1908. In the entire Austro-Hungarian Empire of approximately 50 million people, about 23 million were Slavs. The Slavic peoples who were, for the most part, denied a voice in the affairs of the Austro-Hungarian Empire, were calling for national self-determination. During World War I, representatives of the Czechs, Slovaks, Poles, Serbs, Croats, and Slovenes set up organizations in the Allied countries to gain sympathy and recognition. In 1918, after World War I ended, the Slavs established such independent states as Czechoslovakia, the Second Polish Republic, and the State of Slovenes, Croats and Serbs. Question: What three free Slavic states were in the world as of 1878?
Example Output:
the Russian Empire, Serbia and Montenegro