Problem: USB:

A unit load is defined as 100 mA in USB 1.x and 2.0, and 150 mA in USB 3.0. A device may draw a maximum of five unit loads from a port in USB 1.x and 2.0 (500 mA), or six unit loads in USB 3.0 (900 mA). There are two types of devices: low-power and high-power. A low-power device (such as a USB HID) draws at most one-unit load, with minimum operating voltage of 4.4 V in USB 2.0, and 4 V in USB 3.0. A high-power device draws, at most, the maximum number of unit loads the standard permits. Every device functions initially as low-power (including high-power functions during their low-power enumeration phases), but may request high-power, and get it if available on the providing bus.

What is a unit load defined as?
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A: 100 mA in USB 1.x and 2.0

Problem: Since the 1980s, as the complexity of buildings began to increase (in terms of structural systems, services, energy and technologies), the field of architecture became multi-disciplinary with specializations for each project type, technological expertise or project delivery methods. In addition, there has been an increased separation of the 'design' architect [Notes 1] from the 'project' architect who ensures that the project meets the required standards and deals with matters of liability.[Notes 2] The preparatory processes for the design of any large building have become increasingly complicated, and require preliminary studies of such matters as durability, sustainability, quality, money, and compliance with local laws. A large structure can no longer be the design of one person but must be the work of many. Modernism and Postmodernism have been criticised by some members of the architectural profession who feel that successful architecture is not a personal, philosophical, or aesthetic pursuit by individualists; rather it has to consider everyday needs of people and use technology to create liveable environments, with the design process being informed by studies of behavioral, environmental, and social sciences.
About when did architecture begin specializing?
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Answer: Since the 1980s

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Public opinion pressured the U.S. government to bring Villa to justice for the raid on Columbus, New Mexico; U.S. President Wilson sent Gen. John J. Pershing and some 5,000 troops into Mexico in an unsuccessful attempt to capture Villa. It was known as the Punitive Expedition. After nearly a year of pursuing Villa, American forces returned to the United States. The American intervention had been limited to the western sierras of Chihuahua. Villa had the advantage of intimately knowing the inhospitable terrain of the Sonoran Desert and the almost impassable Sierra Madre mountains and always managed to stay one step ahead of his pursuers. In 1923 Villa was assassinated by a group of seven gunmen who ambushed him while he was sitting in the back seat of his car in Parral.
Which city did Villa raid?
A: Columbus, New Mexico

Context and question: Prince Hall Freemasonry exists because of the refusal of early American lodges to admit African-Americans. In 1775, an African-American named Prince Hall, along with fourteen other African-Americans, was initiated into a British military lodge with a warrant from the Grand Lodge of Ireland, having failed to obtain admission from the other lodges in Boston. When the military Lodge left North America, those fifteen men were given the authority to meet as a Lodge, but not to initiate Masons. In 1784, these individuals obtained a Warrant from the Premier Grand Lodge of England (GLE) and formed African Lodge, Number 459. When the UGLE was formed in 1813, all U.S.-based Lodges were stricken from their rolls due largely to the War of 1812. Thus, separated from both UGLE and any concordantly recognised U.S. Grand Lodge, African Lodge re-titled itself as the African Lodge, Number 1 and became a de facto "Grand Lodge" (this Lodge is not to be confused with the various Grand Lodges on the Continent of Africa). As with the rest of U.S. Freemasonry, Prince Hall Freemasonry soon grew and organised on a Grand Lodge system for each state.
Why was Prince Hall Freemasonry formed?
Answer: refusal of early American lodges to admit African-Americans

Question: Throughout history there have been a series of lingua francas in the area to allow for better communication. The dialects spoken in Hangzhou, Shaoxing, and Ningbo have taken on this role historically. Since the founding of the People's Republic of China in 1949, Mandarin, which is not mutually intelligible with any of the local dialects, has been promoted as the standard language of communication throughout China. As a result, most of the population now can, to some degree, speak and comprehend Mandarin and can code-switch when necessary. A majority of the population educated since 1978 can speak Mandarin. Urban residents tend to be more fluent in Mandarin than rural people. Nevertheless, a Zhejiang accent is detectable in almost everyone from the area communicating in Mandarin, and the home dialect remains an important part of the everyday lives and cultural identities of most Zhejiang residents.
Is there an answer to this question: A minority of the population educated since what year can speak Mandarin?

Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Through-hole manufacture adds to board cost by requiring many holes to be drilled accurately, and limits the available routing area for signal traces on layers immediately below the top layer on multi-layer boards since the holes must pass through all layers to the opposite side. Once surface-mounting came into use, small-sized SMD components were used where possible, with through-hole mounting only of components unsuitably large for surface-mounting due to power requirements or mechanical limitations, or subject to mechanical stress which might damage the PCB.
What type of boards end up with limited routing space in through-hole manufacture?
A:
multi-layer