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 Input: Passage: Since the end of World War II, in part due to industrial size and the onset of the Cold War, the United States has often been a proponent of reduced tariff-barriers and free trade. The U.S. helped establish the General Agreement on Tariffs and Trade and later the World Trade Organization ; although it had rejected an earlier version in the 1950s . Since the 1970s, U.S. governments have negotiated managed-trade agreements, such as the North American Free Trade Agreement in the 1990s, the Dominican Republic-Central America Free Trade Agreement in 2006, and a number of bilateral agreements . In Europe, six countries formed the European Coal and Steel Community in 1951 which became the European Economic Community in 1958. Two core objectives of the EEC were the development of a common market, subsequently renamed the single market, and establishing a customs union between its member states. After expanding its membership, the EEC became the European Union in 1993. The European Union, now the world's largest single market, has concluded free trade agreements with many countries around the world.
Question: When did the countries that later formed the European Union first join?
Example Output: date

Example Input: Passage: Louis arrived in Charleroi on 5 May 1672. Turenne's 50,000 men set off on 11 May. Arrived at Vise, Louis decided not to lay siege to Maastricht but only to occupy the surrounding forts of Tongeren, Maaseik and Valkenburg so its garrison stayed bottled up. Moving along the Rhine, Rheinberg, Wesel, Burick and Orsoy were taken. Turenne then took Nijmegen , with 4,000 infantry and 400 cavalry, and from there Fort Crevecur near 's-Hertogenbosch, which fell after only two days. In view of these defeats, the Dutch public panicked and rioted. Leading politicians Johan and Cornelis de Witt were lynched by an angry Orangist mob, following rumours that they were planning the assassination of William of Nassau . On 4 July, William was acclaimed stadtholder. As the French had promised the major cities of Holland to the English, they were in no hurry to capture them. The French tried to gain sixteen million guilders from the Dutch in exchange for a separate peace. This demand and other conditions posed by the French stiffened Dutch resistance. Negotiations gave the Republic time to finish the inundations along the Dutch Water Line, started on 22 June 1672. Luxembourg laid siege to Groningen but failed to take it. An attempt was made to invade the Republic by sea; this was thwarted by Admiral Michiel de Ruyter in four strategic victories against the combined Anglo-French fleet . The first of these naval victories was the Battle of Solebay.
Question: What 1/10 of a decade did Louis arrive in Charleroi?
Example Output: date

Example Input: Passage: The oldest securely dated tin bronze artefact are found in the heart of the Balkans in Serbia. A tin bronze foil from the Plocnik are dated to 4650 BC. The foil are not the only tin bronze artefact from the fifth millennium BC. 14 other artefacts from Serbia and Bulgaria are dated to before 4000 BC. The recent discoveries indicate that early tin bronze was more common than previously thought, and developed independently in Europe 1500 years before the first tin bronze alloys in the Near East. The production of complex tin bronzes lasted for c. 500 years in the Balkans. Shortly before the end of the fifth millennium BC, there are no longer evidence for production of tin bronze. This coincides with the collapse of large cultural complexes in the Balkans.Tin bronze would be reintroduced to the area again some 1500 years later.
Question: From which year is the The oldest securely dated tin bronze artifact
Example Output:
date