You will be given a definition of a task first, then some input of the task.
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: In the early 16th century, the present-day Myanmar comprised several small kingdoms. The Ava Kingdom, the principal power in Upper Burma in the 14th and 15th centuries, had been fighting a long losing war against an alliance of its former vassal states: the Confederation of Shan States and Prome . Another former vassal state Toungoo , hemmed in by the Bago Yoma range in the west and the Shan Hills in the east, stayed out of the internecine warfare raging in Upper Burma. As the only peaceful state in Upper Burma, Toungoo had received a steady stream of refugees. Then, in 1527, the Confederation finally defeated Ava, and in 1532, its erstwhile ally Prome. Its paramount leader Sawlon I of Mohnyin had now reunited most of Upper Burma and cis-Salween Shan states for the first time since 1480. Toungoo, the only remaining holdout, was his "obvious next target." Fortunately for Toungoo, Sawlon I was assassinated in 1533 on his return trip from Prome, and his son and successor Thohanbwa, based out of Ava, was not accepted as the first among equals by other saophas of the Confederation. Without a strong leader, the Confederation suddenly ceased to be a unified force capable of combined action.
Output:
How many years after the Confederation defeated Ava did it defeat Prome?