Detailed Instructions: This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning).
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.
Problem:Passage: The Danish mercenary army was superior to the Swedish peasant army, but the professional army would not fight until their pay was current. Because only a fraction of the army would march, Denmark had to give up the plan to take the fortress of Kalmar and settle for an attack on Stockholm instead. In August 1564, Eric attacked Blekinge and his army occupied it cruelly , though the Danish later reclaimed this. Eric XIV turned insane, paralyzing the Swedish war effort. The Danish were exhausted and made no serious attacks until Rantzau attacked Smaland and Ostergotland with about 8,500 men. He burned every field and house and destroyed every head of livestock he could. An attempt to cut off his retreat over the Holaveden failed, and in the middle of February 1568 he returned to Halland. Attempts were made to make peace between the fighting nations during these years. Negotiators included the dukes of Pomerania, French messenger Charles Dancay, and Holy Roman Emperors Ferdinand I and Maximilian II. The emperors wanted Denmark and Sweden to give back the territories won in Livonia, during the ongoing Livonian War, but Sweden refused to give in to those demands. In 1568, the Swedish duke John staged a successful coup d'etat against his brother, King Eric. Enthroned as king with the name John III, he began negotiations with Denmark, and on 18 November the same year this led to a draft peace agreement in Roskilde. This was turned down by the Swedes, however, and in 1569 war stirred again. The Danes attacked and reclaimed Varberg, on 13 November. The Swedes on the other hand now had great success in Skane.
Solution:
How many years did King Eric fight the Danish before he failed and returned to Halland?