The problem: Answer a question about this article:
In 1957, she made a state visit to the United States, where she addressed the United Nations General Assembly on behalf of the Commonwealth. On the same tour, she opened the 23rd Canadian Parliament, becoming the first monarch of Canada to open a parliamentary session. Two years later, solely in her capacity as Queen of Canada, she revisited the United States and toured Canada. In 1961, she toured Cyprus, India, Pakistan, Nepal, and Iran. On a visit to Ghana the same year, she dismissed fears for her safety, even though her host, President Kwame Nkrumah, who had replaced her as head of state, was a target for assassins. Harold Macmillan wrote, "The Queen has been absolutely determined all through ... She is impatient of the attitude towards her to treat her as ... a film star ... She has indeed 'the heart and stomach of a man' ... She loves her duty and means to be a Queen." Before her tour through parts of Quebec in 1964, the press reported that extremists within the Quebec separatist movement were plotting Elizabeth's assassination. No attempt was made, but a riot did break out while she was in Montreal; the Queen's "calmness and courage in the face of the violence" was noted.
When did Elizabeth address the UN General Assembly?
****
The answer: 1957

The problem: Answer a question about this article:
The group changed their name to Destiny's Child in 1996, based upon a passage in the Book of Isaiah. In 1997, Destiny's Child released their major label debut song "Killing Time" on the soundtrack to the 1997 film, Men in Black. The following year, the group released their self-titled debut album, scoring their first major hit "No, No, No". The album established the group as a viable act in the music industry, with moderate sales and winning the group three Soul Train Lady of Soul Awards for Best R&B/Soul Album of the Year, Best R&B/Soul or Rap New Artist, and Best R&B/Soul Single for "No, No, No". The group released their multi-platinum second album The Writing's on the Wall in 1999. The record features some of the group's most widely known songs such as "Bills, Bills, Bills", the group's first number-one single, "Jumpin' Jumpin'" and "Say My Name", which became their most successful song at the time, and would remain one of their signature songs. "Say My Name" won the Best R&B Performance by a Duo or Group with Vocals and the Best R&B Song at the 43rd Annual Grammy Awards. The Writing's on the Wall sold more than eight million copies worldwide. During this time, Beyonce recorded a duet with Marc Nelson, an original member of Boyz II Men, on the song "After All Is Said and Done" for the soundtrack to the 1999 film, The Best Man.
Which film featured Destiny's Child's first major single?
****
The answer: Men in Black

The problem: Answer a question about this article:
Alloying a metal is done by combining it with one or more other metals or non-metals that often enhance its properties. For example, steel is stronger than iron, its primary element. The electrical and thermal conductivity of alloys is usually lower than that of the pure metals. The physical properties, such as density, reactivity, Young's modulus of an alloy may not differ greatly from those of its elements, but engineering properties such as tensile strength and shear strength may be substantially different from those of the constituent materials. This is sometimes a result of the sizes of the atoms in the alloy, because larger atoms exert a compressive force on neighboring atoms, and smaller atoms exert a tensile force on their neighbors, helping the alloy resist deformation. Sometimes alloys may exhibit marked differences in behavior even when small amounts of one element are present. For example, impurities in semiconducting ferromagnetic alloys lead to different properties, as first predicted by White, Hogan, Suhl, Tian Abrie and Nakamura. Some alloys are made by melting and mixing two or more metals. Bronze, an alloy of copper and tin, was the first alloy discovered, during the prehistoric period now known as the bronze age; it was harder than pure copper and originally used to make tools and weapons, but was later superseded by metals and alloys with better properties. In later times bronze has been used for ornaments, bells, statues, and bearings. Brass is an alloy made from copper and zinc.
What can be done to a metal to enhance its properties?
****
The answer: combining it with one or more other metals or non-metals

The problem: Answer a question about this article:
Polarization is the sum of the E-plane orientations over time projected onto an imaginary plane perpendicular to the direction of motion of the radio wave. In the most general case, polarization is elliptical, meaning that the polarization of the radio waves varies over time. Two special cases are linear polarization (the ellipse collapses into a line) as we have discussed above, and circular polarization (in which the two axes of the ellipse are equal). In linear polarization the electric field of the radio wave oscillates back and forth along one direction; this can be affected by the mounting of the antenna but usually the desired direction is either horizontal or vertical polarization. In circular polarization, the electric field (and magnetic field) of the radio wave rotates at the radio frequency circularly around the axis of propagation. Circular or elliptically polarized radio waves are designated as right-handed or left-handed using the "thumb in the direction of the propagation" rule. Note that for circular polarization, optical researchers use the opposite right hand rule from the one used by radio engineers.
What is the name to describe polarization of radio waves varies over times?
****
The answer:
elliptical