Input: Copper
Polyols, compounds containing more than one alcohol functional group, generally interact with cupric salts. For example, copper salts are used to test for reducing sugars. Specifically, using Benedict's reagent and Fehling's solution the presence of the sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose. Amino acids form very stable chelate complexes with copper(II). Many wet-chemical tests for copper ions exist, one involving potassium ferrocyanide, which gives a brown precipitate with copper(II) salts.

What are copper salts used to test?
Output: reducing sugars

Input: United States Army
During the Cold War, American troops and their allies fought Communist forces in Korea and Vietnam. The Korean War began in 1950, when the Soviets walked out of a U.N. Security meeting, removing their possible veto. Under a United Nations umbrella, hundreds of thousands of U.S. troops fought to prevent the takeover of South Korea by North Korea, and later, to invade the northern nation. After repeated advances and retreats by both sides, and the PRC People's Volunteer Army's entry into the war, the Korean Armistice Agreement returned the peninsula to the status quo in 1953.

In what year did the Korean war end?
Output: 1953

Input: New Haven, Connecticut
New Haven is a predominantly Roman Catholic city, as the city's Dominican, Irish, Italian, Mexican, Ecuadorian, and Puerto Rican populations are overwhelmingly Catholic. The city is part of the Archdiocese of Hartford. Jews also make up a considerable portion of the population, as do Black Baptists. There is a growing number of (mostly Puerto Rican) Pentecostals as well. There are churches for all major branches of Christianity within the city, multiple store-front churches, ministries (especially in working-class Latino and Black neighborhoods), a mosque, many synagogues (including two yeshivas), and other places of worship; the level of religious diversity in the city is high.

Under what immediate jurisdiction of the Catholic Church does New Haven fall?
Output: Archdiocese of Hartford

Input: The Bronx
There are three primary shopping centers in the Bronx: The Hub, Gateway Center and Southern Boulevard. The HubThird Avenue Business Improvement District (B.I.D.), in The Hub, is the retail heart of the South Bronx, located where four roads converge: East 149th Street, Willis, Melrose and Third Avenues. It is primarily located inside the neighborhood of Melrose but also lines the northern border of Mott Haven. The Hub has been called "the Broadway of the Bronx", being likened to the real Broadway in Manhattan and the northwestern Bronx. It is the site of both maximum traffic and architectural density. In configuration, it resembles a miniature Times Square, a spatial "bow-tie" created by the geometry of the street. The Hub is part of Bronx Community Board 1.

What is the main retail area of the South Bronx?
Output:
The HubThird Avenue Business Improvement District