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.
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Question: Passage: At the beginning of the period the Time of Troubles disorganized the frontier defenses and led to much destruction. The Oka region was raided almost every year, but with decreasing frequency. 1633 may have been the last crossing of the Oka. We hear more frequently of raids at such places as Kursk and Voronezh, implying stronger defense in the north and a southern movement of the Russian population. The Belgorod Line of forts was begun about 1633 and seems to have had noticeable effects after about 1640. We hear of raids on Poland in 1614-21, 1624-28, 1633, 1640 and 1642.
Question: How many years since the first and last raid passed that we heard about in Poland?

Answer: number

Question: Passage: Coming off their bye week, the Texans were at home for a Week 11 interconference duel with the New Orleans Saints. In the first quarter, Houston trailed early as Saints kicker Olindo Mare completed a 52-yard field goal. Fortunately, the Texans responded with QB Matt Schaub completing a 73-yard TD pass to WR Andre Johnson. In the second quarter, New Orleans regained the lead with QB Drew Brees completing a 6-yard TD pass to WR Devery Henderson. Fortunately, Houston would reply with Schaub completing a 10-yard TD pass to TE Joel Dreesen, along with kicker Kris Brown getting a 36-yard field goal. After a scoreless third quarter, the Texans took control in the fourth quarter as Brown nailed a 53-yard and a 23-yard field goal. With the win, the Texans (for the first time in franchise history) improved to 5-5. Andre Johnson, in his first game back from injuries, had an impressive day with 6 receptions for 120 yards and 1 touchdown. DE Mario Williams had a big game, as he had 6 tackles, a sack, and a forced fumble.
Question: How many yards was the longest field goal?

Answer: number

Question: Passage: Svitrigaila was losing his influence in the Slavic principalities and could no longer resist Poland and Sigismund. On 4 September 1437 he attempted to reconcile with Poland: he would rule the lands that still backed him , and after his death these territories would pass to the King of Poland. However, under strong protest from Sigismund, the Polish Senate declined to ratify the treaty . In 1438 Svitrigaila withdrew to Moldavia. The reign of Sigismund Kestutaitis was brief he was assassinated in 1440. Svitrigaila returned from exile in 1442 and ruled Lutsk until his death a decade later. Jogaila's son Casimir IV Jagiellon, born in 1426, received approval as a hereditary hospodar from Lithuania's ruling families in 1440. This event is seen by the historians Jerzy Lukowski and Hubert Zawadzki as marking the end of the succession dispute.
Question: What year did Svitrigaila die?

Answer:
date