TASK DEFINITION: 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 2015 Southeast Asian Games used a mix of new, existing and temporary venues. Given the city-state's compact size, most venues were pre-existing public-sporting facilities located in the suburban heartlands which were reverted to public use after the games. No major retrofitting work were done in most venues as most had been used to host major multi-disciplinary events such as the 2010 Youth Olympic Games. At the centrepiece of the activities was the Singapore Sports Hub which was completed in mid-2014. Incorporating the new 55,000-seat national stadium, it hosted most of the events. A games village was not built. Instead, a "village in the city" concept saw athletes and officials housed in 20 hotels in downtown Singapore. Besides being physically near to the Singapore Sports Hub, it was hoped that it will add vibe to the city and reduce post-games costs in converting a dedicated games village to other uses. The 28th Southeast Asian Games had 30 venues for the games.
Question: What year was the new stadium finished?

SOLUTION: date

PROBLEM: 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?

SOLUTION: span

PROBLEM: Passage: In January 1918, Romanian forces established control over Bessarabia as the Russian Army abandoned the province. Although a treaty was signed by the Romanian and Bolshevik Russian governments following talks between 5 and 9 March 1918 on the withdrawal of Romanian forces from Bessarabia within two months, on 27 March 1918 Romania formally attached Bessarabia to its territory, based on a resolution passed by the local assembly of that territory on its unification with Romania. Romania officially made peace with the Central Powers by signing the Treaty of Bucharest on 7 May 1918. Under the treaty, Romania was obliged to end the war with the Central Powers and make small territorial concessions to Austria-Hungary, ceding control of some passes in the Carpathian Mountains, and to grant oil concessions to Germany. In exchange, the Central Powers recognised the sovereignty of Romania over Bessarabia. The treaty was renounced in October 1918 by the Alexandru Marghiloman government, and Romania nominally re-entered the war on 10 November 1918. The next day, the Treaty of Bucharest was nullified by the terms of the Armistice of Compiegne. Total Romanian deaths from 1914 to 1918, military and civilian, within contemporary borders, were estimated at 748,000.
Question: How many months after Romanian forces established control over Bessarabia did Romania formally attach Bessarabia?

SOLUTION:
number