Detailed Instructions: 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.
See one example below:
Problem: Passage: The outbreak of the Seven Years' War in Europe in 1756 resulted in renewed conflict between French and British forces in India. The Third Carnatic War spread beyond southern India and into Bengal where British forces captured the French settlement of Chandernagore in 1757. However, the war was decided in the south, where the British successfully defended Madras, and Sir Eyre Coote decisively defeated the French, commanded by Comte de Lally at the Battle of Wandiwash in 1760. After Wandiwash, the French capital of Pondicherry fell to the British in 1761. The war concluded with the signing of the Treaty of Paris in 1763, which returned Chandernagore and Pondichery to France, and allowed the French to have "factories" in India but forbade French traders from administering them. The French agreed to support British client governments, thus ending French ambitions of an Indian empire and making the British the dominant foreign power in India.
Question: Which french settlement did the British capture first, Chandernagore or Pondicherry?
Solution: span
Explanation: The answer "Chandernagore" is a word from the passage. So, the answer type is "span".

Problem: Passage: Since the later 20th century, the Seneca have been increasingly active in exercising sovereignty on their reservation and enforcing their property rights. Their relations with the non-Native surrounding population have become contentious, in regard to excise tax advantages and to their property rights. In the 1990s, the Senecas won a prolonged court battle to assume ownership of all land on their reservation, including that owned by private non-Seneca. The city had been developed under a 99-year federal lease arrangement with the Seneca Nation. It had provided land to railroads to encourage development, which the railroad developed for workers and their families, and related businesses. This arrangement was confirmed by acts of Congress in 1875, 1890 and 1990. When that lease expired in 1991, the Seneca Nation demanded that the previous owners sign new leases with their nation for not only the underlying land, but also the improvements as well, or be evicted. The Seneca evicted fifteen property owners from their homes for refusing to sign over their properties. The increase in lease revenue from this reinterpretation has generated sufficient revenue for the nation to pay its enrolled members a quarterly social dividend, providing those members with a basic income. In a similar case in 2012, the Seneca ordered an eviction of 80 residents of summer cottages at Snyder Beach on the Cattaraugus Reservation, a location near Sunset Bay. They had previously notified the owner of the land that his leases to non-Seneca were not permissible, but he had done nothing to clear his property. Some of the residents were from families who had rented there for decades. The Seneca described the non-Natives as constituting a long-standing "illegal occupation".
Question: When was the last time Congress confirmed leasing arragements with the Seneca Nation?
Solution:
date