Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Passage: In 1763, Spain traded Florida to the Kingdom of Great Britain for control of Havana, Cuba, which had been captured by the British during the Seven Years' War. It was part of a large expansion of British territory following the country's victory in the Seven Years' War. Almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba. The British soon constructed the King's Road connecting St. Augustine to Georgia. The road crossed the St. Johns River at a narrow point, which the Seminole called Wacca Pilatka and the British named "Cow Ford", both names ostensibly reflecting the fact that cattle were brought across the river there.
Solution: Who owned Cuba after the Eight Years War?
Reason: This question appears to be relevant to the passage as both involves words such as 'Cuba' and 'War' which also exist in the passage. The passage mentions that "after the war, almost the entire Spanish population left, taking along most of the remaining indigenous population to Cuba". This information is not sufficient to conclude that which country owned cuba.

Now, solve this instance: Passage: At the same time, naval innovations led to a German domination of trade in the Baltic Sea and parts of Eastern Europe through the Hanseatic League. Along the trade routes, Hanseatic trade stations became centers of the German culture. German town law (Stadtrecht) was promoted by the presence of large, relatively wealthy German populations, their influence and political power. Thus people who would be considered "Germans", with a common culture, language, and worldview different from that of the surrounding rural peoples, colonized trading towns as far north of present-day Germany as Bergen (in Norway), Stockholm (in Sweden), and Vyborg (now in Russia). The Hanseatic League was not exclusively German in any ethnic sense: many towns who joined the league were outside the Holy Roman Empire and a number of them may only loosely be characterized as German. The Empire itself was not entirely German either. It had a multi-ethnic and multi-lingual structure, some of the smaller ethnicities and languages used at different times were Dutch, Italian, French, Czech and Polish.
Student:
What lead to the defeat of the Hanseatic League?