The problem: Answer a question about this article:
Machine vision systems often require bright and homogeneous illumination, so features of interest are easier to process. LEDs are often used for this purpose, and this is likely to remain one of their major uses until the price drops low enough to make signaling and illumination uses more widespread. Barcode scanners are the most common example of machine vision, and many low cost products use red LEDs instead of lasers. Optical computer mice are an example of LEDs in machine vision, as it is used to provide an even light source on the surface for the miniature camera within the mouse. LEDs constitute a nearly ideal light source for machine vision systems for several reasons:
What can help make LEDs more widely used?
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The answer: price drops

Problem: Please answer a question about the following article about Dwight D. Eisenhower:
Eisenhower began smoking cigarettes at West Point, often two or three packs a day. Eisenhower stated that he "gave [himself] an order" to stop cold turkey in March 1949 while at Columbia. He was probably the first president to release information about his health and medical records while in office. On September 24, 1955, while vacationing in Colorado, he had a serious heart attack that required six weeks' hospitalization, during which time Nixon, Dulles, and Sherman Adams assumed administrative duties and provided communication with the President. He was treated by Dr. Paul Dudley White, a cardiologist with a national reputation, who regularly informed the press of the President's progress. Instead of eliminating him as a candidate for a second term as President, his physician recommended a second term as essential to his recovery.
When did Eisenhower stop smoking completely?
A: March 1949

Question: Read this and answer the question

As aristocrats for centuries, samurai developed their own cultures that influenced Japanese culture as a whole. The culture associated with the samurai such as the tea ceremony, monochrome ink painting, rock gardens and poetry were adopted by warrior patrons throughout the centuries 12001600. These practices were adapted from the Chinese arts. Zen monks introduced them to Japan and they were allowed to flourish due to the interest of powerful warrior elites. Muso Soseki (12751351) was a Zen monk who was advisor to both Emperor Go-Daigo and General Ashikaga Takauji (130458). Muso, as well as other monks, acted as political and cultural diplomat between Japan and China. Muso was particularly well known for his garden design. Another Ashikaga patron of the arts was Yoshimasa. His cultural advisor, the Zen monk Zeami, introduced tea ceremony to him. Previously, tea had been used primarily for Buddhist monks to stay awake during meditation.

When was Muso Soseki born?
Answer: 1275

Problem: The earliest variant of the name that became Tennessee was recorded by Captain Juan Pardo, the Spanish explorer, when he and his men passed through an American Indian village named "Tanasqui" in 1567 while traveling inland from South Carolina. In the early 18th century, British traders encountered a Cherokee town named Tanasi (or "Tanase") in present-day Monroe County, Tennessee. The town was located on a river of the same name (now known as the Little Tennessee River), and appears on maps as early as 1725. It is not known whether this was the same town as the one encountered by Juan Pardo, although recent research suggests that Pardo's "Tanasqui" was located at the confluence of the Pigeon River and the French Broad River, near modern Newport.
What nationality was Juan Pardo?
The answer is the following: Spanish

Sumerian cities during the Uruk period were probably theocratic and were most likely headed by a priest-king (ensi), assisted by a council of elders, including both men and women. It is quite possible that the later Sumerian pantheon was modeled upon this political structure. There was little evidence of organized warfare or professional soldiers during the Uruk period, and towns were generally unwalled. During this period Uruk became the most urbanized city in the world, surpassing for the first time 50,000 inhabitants.
Over how many people lived in Uruk?
50,000

Here is a question about this article: Tucson has a desert climate (Koppen BWh), with two major seasons, summer and winter; plus three minor seasons: fall, spring, and the monsoon. Tucson averages 11.8 inches (299.7 mm) of precipitation per year, more than most other locations with desert climates, but it still qualifies due to its high evapotranspiration; in other words, it experiences a high net loss of water. A similar scenario is seen in Alice Springs, Australia, which averages 11 inches (279.4 mm) a year, but has a desert climate.
What is the answer to this question: What does Tuscon have a high net loss of?
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So...
water