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.
Example: Passage: The outbreak of the Seven Years' War in Europe in 1756 resulted in renewed conflict between French and British forces in India. The Third Carnatic War spread beyond southern India and into Bengal where British forces captured the French settlement of Chandernagore in 1757. However, the war was decided in the south, where the British successfully defended Madras, and Sir Eyre Coote decisively defeated the French, commanded by Comte de Lally at the Battle of Wandiwash in 1760. After Wandiwash, the French capital of Pondicherry fell to the British in 1761. The war concluded with the signing of the Treaty of Paris in 1763, which returned Chandernagore and Pondichery to France, and allowed the French to have "factories" in India but forbade French traders from administering them. The French agreed to support British client governments, thus ending French ambitions of an Indian empire and making the British the dominant foreign power in India.
Question: Which french settlement did the British capture first, Chandernagore or Pondicherry?
Example solution: span
Example explanation: The answer "Chandernagore" is a word from the passage. So, the answer type is "span".

Problem: Passage: According to Iranian government sources, the war cost Iran an estimated 200,000220,000 killed, or up to 262,000 according to the conservative Western estimates. This includes 123,220 combatants, 60,711 Missing in action and 11,00016,000 Civilian casualties. Combatants include 79,664 members of the Islamic Revolutionary Guard Corps and additional 35,170 soldiers from Armed Forces of the Islamic Republic of Iran. In addition, prisoners of war comprise 42,875 Iranian casualties, they were captured and kept in Iraqi detention centers from 2.5 to more than 15 years after the war was over. According to the Janbazan Affairs Organization, 398,587 Iranians sustained injuries that required prolonged medical and health care following primary treatment, including 52,195 (13%) injured due to the exposure to chemical warfare agents. From 1980 to 2012, 218,867 Iranians died due to war injuries and the mean age of combatants was 23 years old. This includes 33,430 civilians, mostly women and children. More than 144,000 Iranian children were orphaned as a consequence of these deaths. Other estimates put Iranian casualties up to 600,000.
Question: How many years was the time span where 218,867 Iranians died due to war injuries?
Solution: number