Detailed Instructions: This task involves annotating the answer type to a given question that involve some kind of complex reasoning (including numerical reasoning). Note that the questions require looking at more than one part of the passage to answer. There are 3 possible answer types (i) spans, (ii) numbers and (iii) dates. If the answer can be found in the passage, label it as "span". If the answer is a number, label as "number". Similarly, label "date" if you think the answer to the given question is a date.
Problem:Passage: The conflict is often referred to by different names, most commonly the Russo-Polish War, with the term Russia replacing the term Muscovy. In Polish historiography, the wars are usually referred to as the Dimitriads: the First Dymitriad and Second Dymitriad and the Polish-Muscovite War , which can subsequently be divided into two wars of 1609-1611 and 1617-1618, and may or may not include the 1617-1618 campaign, which is sometimes referred to as Chodkiewicz Campaign. According to Russian historiography, the chaotic events of the war fall into the "Time of Troubles". The conflict with Poles is commonly called the Polish Invasion, Polish Intervention, or more specifically the Polish Intervention of the Early Seventeenth Century.
Question: How many years long was the longest war?
Solution:
number