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.

Ex Input:
Passage: Although Satsunan literally means the south of Satsuma Province, the north-eastern group of the Osumi Islands formed Tane Province for a brief period in the 8th and 9th centuries and then were merged into Osumi Province. The Tokara Islands and the northwestern group of the Osumi Islands belonged to Kawanabe District of Satsuma Province. The Amami Islands paid tribute to the Ryukyu Kingdom to the South until they were put under direct control in the late 16th century, but were conquered in 1609 by the Satsuma Domain. In 1879, the Amami Islands became Oshima District of Kagoshima Prefecture. The Tokara Islands and the north-western group of the Osumi Islands were transferred to Oshima District in 1897, and then to Kagoshima District in 1973. After World War II, the Tokara and Amami Islands were put under United States military occupation, which formed the Government of the Northern Ryukyus. The Japanese government fiercely contested the Amami Islands being affiliated with the word "Ryukyu", believing that it would lead to a later return of the islands to their control. The Tokara Islands were returned to Japan in 1952, which were followed by the Amami Islands in December 1953.
Question: Which island was returned to Japan last?

Ex Output:
span

Ex Input:
Passage: He represented the Liberal party at the Norwegian Parliament (Storting) 1886-1888 and again in 1892-1898. He was Minister of Labour (18981899, 19001902, 19021903), a member of the Council of State Division in Stockholm (18991900), Minister of Foreign Affairs (1905 and 19051907), Prime Minister and Minister of Foreign Affairs (19071908), and Minister of Education and Church Affairs (19151920). In 1905 became the prime minister in Stockholm. He was chair of the Norwegian government of Christian Michelsen. In October 1907, Lvland took over as Norwegian Prime Minister when Michelsen resigned. Lvland resigned the position in March 1908.
Question: How many titles did he hold that lasted for more than a couple of years?

Ex Output:
number

Ex Input:
Passage: Various immediate causes having been ascribed to causing the outbreak of violence in 1454. Professor Griffiths has suggested that Lord Cromwell's manor of Wressle, Yorkshire, was seized by the Percys following the joining of the Cromwell and Neville families in marriage in 1453 , and that Cromwell viewed the Nevilles as allies against the Percys. Likewise, Warwick's feud with Somerset in south Glamorgan may have driven him into an alliance with the duke of York against him. Griffiths also suggests that the single most important event to precipitate the feud was the marriage of Salisbury's second son, Thomas Neville to Maud Stanhope, the widow of Robert, Lord Willoughby. Not only, says Griffiths, was any further aggrandisement for Salisbury's family anathema to the Percys, but the new Cromwell connection gave the Nevilles access to the ex-Percy manors of Wressle and Burwell, two-thirds of which had each been granted to Cromwell for life in February 1438, together with the reversion of the remainder. This grant was then converted into one in fee simple two years later, further reducing the likelihood of the Percys reclaiming it. Griffiths has calculated Burwell to have been worth an income of c. 38 10s 6d per annum in 145-6. These manors had been forfeited in 1403 by the first earl of Northumberland after the failure of the Percy Rebellion against Henry IV, and Cromwell's holding them in fee-simple meant they were available to him to grant away to whoever he liked.
Question: What year was the grant converted into one fee simple?

Ex Output:
date