Input: Read this: The noise-based speed is defined as the exposure that will lead to a given signal-to-noise ratio on individual pixels. Two ratios are used, the 40:1 ("excellent image quality") and the 10:1 ("acceptable image quality") ratio. These ratios have been subjectively determined based on a resolution of 70 pixels per cm (178 DPI) when viewed at 25 cm (9.8 inch) distance. The signal-to-noise ratio is defined as the standard deviation of a weighted average of the luminance and color of individual pixels. The noise-based speed is mostly determined by the properties of the sensor and somewhat affected by the noise in the electronic gain and AD converter.
Question: What are the individual pixels defined by?

Output: unanswerable

Input: Read this: Buddhists believe Gautama Buddha was the first to achieve enlightenment in this Buddha era and is therefore credited with the establishment of Buddhism. A Buddha era is the stretch of history during which people remember and practice the teachings of the earliest known Buddha. This Buddha era will end when all the knowledge, evidence and teachings of Gautama Buddha have vanished. This belief therefore maintains that many Buddha eras have started and ended throughout the course of human existence.[web 15][web 16] The Gautama Buddha, therefore, is the Buddha of this era, who taught directly or indirectly to all other Buddhas in it (see types of Buddhas).
Question: What is the term for the stretch of history during which people rmember and practice the teachings of the earliest known buddha?

Output: A Buddha era

Input: Read this: From the Middle Ages, aristocrats were buried inside chapels, while monks and other people associated with the abbey were buried in the cloisters and other areas. One of these was Geoffrey Chaucer, who was buried here as he had apartments in the abbey where he was employed as master of the King's Works. Other poets, writers and musicians were buried or memorialised around Chaucer in what became known as Poets' Corner. Abbey musicians such as Henry Purcell were also buried in their place of work.[citation needed]
Question: Henry Purcell was burned where?

Output: unanswerable

Input: Read this: Grande Saline Bay provides temporary anchorage for small vessels while Colombier Bay, to the northwest, has a 4 fathoms patch near mid entrance. In the bight of St. Jean Bay there is a narrow cut through the reef. The north and east sides of the island are fringed, to a short distance from the shore, by a visible coral reef. Reefs are mostly in shallow waters and are clearly visible. The coastal areas abound with beaches and many of these have offshore reefs, some of which are part of a marine reserve.
Question: How deep is St. Jean Bay?

Output:
unanswerable