Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Other types of lossy compressors, such as the linear predictive coding (LPC) used with speech, are source-based coders. These coders use a model of the sound's generator (such as the human vocal tract with LPC) to whiten the audio signal (i.e., flatten its spectrum) before quantization. LPC may be thought of as a basic perceptual coding technique: reconstruction of an audio signal using a linear predictor shapes the coder's quantization noise into the spectrum of the target signal, partially masking it.
What may be thought of as a basic perceptual spectrum?
A: unanswerable

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Airports are divided into landside and airside areas. Landside areas include parking lots, public transportation train stations and access roads. Airside areas include all areas accessible to aircraft, including runways, taxiways and aprons. Access from landside areas to airside areas is tightly controlled at most airports. Passengers on commercial flights access airside areas through terminals, where they can purchase tickets, clear security check, or claim luggage and board aircraft through gates. The waiting areas which provide passenger access to aircraft are typically called concourses, although this term is often used interchangeably with terminal.
What do landside areas include?
A: parking lots, public transportation train stations and access roads

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The only technical university in Mauritius is the University of Technology, Mauritius with its main campus situated in La Tour Koenig, Pointe aux Sables. It has a specialized mission with a technology focus. It applies traditional and beyond traditional approaches to teaching, training, research and consultancy. The university has been founded with the aim to play a key role in the economic and social development of Mauritius through the development of programmes of direct relevance to the country’s needs, for example in areas like technology, sustainable development science, and public sector policy and management.
What's the focus of Mauritius's University of Technology's specialized mission?
A: technology

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Different societies apply differing criteria regarding who is classified as "black", and these social constructs have also changed over time. In a number of countries, societal variables affect classification as much as skin color, and the social criteria for "blackness" vary. For example, in North America the term black people is not necessarily an indicator of skin color or majority ethnic ancestry, but it is instead a socially based racial classification related to being African American, with a family history associated with institutionalized slavery. In South Africa and Latin America, for instance, mixed-race people are generally not classified as "black." In South Pacific regions such as Australia and Melanesia, European colonists applied the term "black" or it was used by populations with different histories and ethnic origin.
What factors can affect the classification of "blackness"?
A:
societal variables