Article: Detroit is cited as the birthplace of techno music in the early 1980s. The city also lends its name to an early and pioneering genre of electronic dance music, "Detroit techno". Featuring science fiction imagery and robotic themes, its futuristic style was greatly influenced by the geography of Detroit's urban decline and its industrial past. Prominent Detroit techno artists include Juan Atkins, Derrick May, and Kevin Saunderson. The Detroit Electronic Music Festival, now known as "Movement", occurs annually in late May on Memorial Day Weekend, and takes place in Hart Plaza. In the early years (2000-2002), this was a landmark event, boasting over a million estimated attendees annually, coming from all over the world to celebrate Techno music in the city of its birth.

Question: When does "Movement" occur?
Ans: Memorial Day Weekend


Article: The foundation explains on its website that its trustees divided the organization into two entities: the Bill & Melinda Gates Foundation (foundation) and the Bill & Melinda Gates Foundation Trust (trust). The foundation section, based in Seattle, US, "focuses on improving health and alleviating extreme poverty," and its trustees are Bill and Melinda Gates and Warren Buffett. The trust section manages "the investment assets and transfer proceeds to the foundation as necessary to achieve the foundation's charitable goals"—it holds the assets of Bill and Melinda Gates, who are the sole trustees, and receives contributions from Buffett.

Question: What two entities was the foundation divided into 
Ans: trustees divided the organization into two entities: the Bill & Melinda Gates Foundation (foundation) and the Bill & Melinda Gates Foundation Trust


Article: In 1902, the Siemens company developed a tantalum lamp filament. These lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures. Since tantalum metal has a lower resistivity than carbon, the tantalum lamp filament was quite long and required multiple internal supports. The metal filament had the property of gradually shortening in use; the filaments were installed with large loops that tightened in use. This made lamps in use for several hundred hours quite fragile. Metal filaments had the property of breaking and re-welding, though this would usually decrease resistance and shorten the life of the filament. General Electric bought the rights to use tantalum filaments and produced them in the US until 1913.

Question: Who purchased the rights to the tantalum light filament from Siemens?
Ans: General Electric


Article: Some alloys occur naturally, such as electrum, which is an alloy that is native to Earth, consisting of silver and gold. Meteorites are sometimes made of naturally occurring alloys of iron and nickel, but are not native to the Earth. One of the first alloys made by humans was bronze, which is made by mixing the metals tin and copper. Bronze was an extremely useful alloy to the ancients, because it is much stronger and harder than either of its components. Steel was another common alloy. However, in ancient times, it could only be created as an accidental byproduct from the heating of iron ore in fires (smelting) during the manufacture of iron. Other ancient alloys include pewter, brass and pig iron. In the modern age, steel can be created in many forms. Carbon steel can be made by varying only the carbon content, producing soft alloys like mild steel or hard alloys like spring steel. Alloy steels can be made by adding other elements, such as molybdenum, vanadium or nickel, resulting in alloys such as high-speed steel or tool steel. Small amounts of manganese are usually alloyed with most modern-steels because of its ability to remove unwanted impurities, like phosphorus, sulfur and oxygen, which can have detrimental effects on the alloy. However, most alloys were not created until the 1900s, such as various aluminium, titanium, nickel, and magnesium alloys. Some modern superalloys, such as incoloy, inconel, and hastelloy, may consist of a multitude of different components.

Question: What metal is made by combining tin and copper?
Ans:
bronze