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.

[Q]: Passage: Col. Edwin Sumner conducted a campaign against the Navajo in 1851. He delegated Maj. Electus Backus to build Fort Defiance in the middle of Diné bikéyah . Col Sumner entered Canyon de Chelly but Navajo harassment attacks caused him to withdraw. In 1855 a treaty was signed at Laguna Negra by Manuelito and Zarcillos Largos for the Navajo and Henry L. Dodge , Governor Merriweather, and General John Garland. Two years later a severe drought hit the Navajo and decimated their livestock and agricultural resources, causing a famine in the winter of 1857-1858. A time of social disruption ensued. Surrounding tribes gradually increased their attacks on the weakened Navajo. The Navajo demanded in 1858 that Fort Defiance stop grazing their livestock on prime Navajo land. Soldiers shot 48 cattle and 8 horses belonging to Manuelito. Navajo warriors killed a servant of the commanding officer in retaliation for the killing of their people's livestock without compensation. The United States military demanded the murderer be brought to them, or they would begin a war. The Miles Campaign was sent against them, leaving Fort Defiance on September 9.
Question: What year did a severe drought hit the Navajo?
[A]: date


[Q]: Passage: The Second Goryeo-Khitan War was an 11th-century conflict between the kingdom of Goryeo and the Liao dynasty  near what is now the border between China and North Korea. It was the second of the Goryeo-Khitan Wars, with the First Goryeo-Khitan War occurring in 993, the second in 1010, and the third in 1018. When King Seongjong died in 997, Liao invested his successor Wang Song as king of Goryeo . In 1009, he was assassinated by the forces of the general Gang Jo. Using it as a pretext, the Liao attacked Goryeo in the next year. They lost the first battle but won the second one, and Gang Jo was captured and killed. The Liao occupied and burnt the Goryeo capital Kaesong. The Khitan withdrew after Goryeo reaffirmed its tributary relationship with the Khitan.
Question: How did Wang Song die?
[A]: span


[Q]: Passage: The 2015 Southeast Asian Games , officially known as the 28th Southeast Asian Games , was a Southeast Asian multi-sport event hosted by the city-state of Singapore. It was the fourth time the country hosted the games and the first time since 1993. Singapore previously also hosted the games in 1973 and 1983. Singapore was awarded rights to host the Southeast Asian Games in 2011 after several delays from 2007 due to the construction of the New National Stadium. The games were held from 5 to 16 June 2015, although several events had commenced from 29 May 2015. Around 4370 athletes participated at the event, which featured 402 events in 36 sports. It was opened by Tony Tan Keng Yam, the President of Singapore at the aforementioned stadium. The final medal tally was led by Thailand, followed by host Singapore and Vietnam. Several Games and national records were broken during the games. Though there were little controversies, the Games were deemed generally successful with its effective management of cost spent to host the games, arrangement of public transport and games promotion and with the rising standard of competition amongst the Southeast Asian nations.
Question: When was the second time Singapore hosted the Southeast Asian Games?
[A]:
date