This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
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Question: Passage: During the Middle Ages, Thuringia was situated at the border between Germanic and Slavic territories, marked by the Saale river. The Ostsiedlung movement led to the assimilation of Slavic people between the 11th and the 13th century under German rule. The population growth increased during the 18th century and stayed high until World War I, before it slowed within the 20th century and changed to a decline since 1990. Since the beginning of Urbanisation around 1840, the Thuringian cities have higher growth rates resp. smaller rates of decline than rural areas (many villages lost half of their population since 1950, whereas the biggest cities (Erfurt and Jena) keep growing).

Answer: Where was Thuringia attacking in the Middle Ages?


Question: Passage: Jews are often identified as belonging to one of two major groups: the Ashkenazim and the Sephardim. Ashkenazim, or "Germanics" (Ashkenaz meaning "Germany" in Hebrew), are so named denoting their German Jewish cultural and geographical origins, while Sephardim, or "Hispanics" (Sefarad meaning "Spain/Hispania" or "Iberia" in Hebrew), are so named denoting their Spanish/Portuguese Jewish cultural and geographic origins. The more common term in Israel for many of those broadly called Sephardim, is Mizrahim (lit. "Easterners", Mizrach being "East" in Hebrew), that is, in reference to the diverse collection of Middle Eastern and North African Jews who are often, as a group, referred to collectively as Sephardim (together with Sephardim proper) for liturgical reasons, although Mizrahi Jewish groups and Sephardi Jews proper are ethnically distinct.

Answer: How many major groups do the Ashkenazim belong to?


Question: Passage: In January 1917, the Watch Tower Society's legal representative, Joseph Franklin Rutherford, was elected as its next president. His election was disputed, and members of the Board of Directors accused him of acting in an autocratic and secretive manner. The divisions between his supporters and opponents triggered a major turnover of members over the next decade. In June 1917, he released The Finished Mystery as a seventh volume of Russell's Studies in the Scriptures series. The book, published as the posthumous work of Russell, was a compilation of his commentaries on the Bible books of Ezekiel and Revelation, plus numerous additions by Bible Students Clayton Woodworth and George Fisher. It strongly criticized Catholic and Protestant clergy and Christian involvement in the Great War. As a result, Watch Tower Society directors were jailed for sedition under the Espionage Act in 1918 and members were subjected to mob violence; charges against the directors were dropped in 1920.

Answer:
In what year did Joseph Franklin Rutherford become the legal representative of the Watch Tower Society?