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.

Passage: With John of Lorraine dead, Rene appointed John's eldest bastard son, John of Calabria, Count of Briey, his new lieutenant. In 1471 the French troops fighting with the Catalans retired to France and the advantage shifted decidedly to John II. Joan Margarit, the Bishop of Girona, returned his city to John , followed by other towns. Duke John of Lorraine died at Barcelona on 16 December 1470 and the Catalans lost their most important ally. King Rene lived until 1480, but was not personally present in Catalonia. King John II campaigned in the Alt Emporda until June 1472 and then against Barcelona. A naval and land siege lasted from November 1471 to 16 October 1472. By the Capitulation of Pedralbes, Barcelona surrendered to king John, John agreed to let the warchief John of Calabria leave peacefully and a general pardon was granted. The Count of Pallars, however, was not pardoned. The acts of the Consell and the other organs of Catalan government since the death of Charles of Viana were approved and John swore to uphold the Constitucions. The Capitulation of Vilafranca, however, was rejected.
How many months did the naval and land seige against Barcelona last?