Text: Four descents have been achieved. The first was the manned descent by Swiss-designed, Italian-built, United States Navy-owned bathyscaphe Trieste which reached the bottom at 1:06 pm on 23 January 1960, with Don Walsh and Jacques Piccard on board. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 11,521 m (37,799 ft), but this was later revised to 10,916 m (35,814 ft). The depth was estimated from a conversion of pressure measured and calculations based on the water density from sea surface to seabed.

Question: has anyone been to the bottom of the mariana trench?

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Answer: yes

Text: Wikipedia is not a reliable source for academic writing or research. Wikipedia is increasingly used by people in the academic community, from freshman students to professors, as an easily accessible tertiary source for information about anything and everything, and as a quick ''ready reference'', to get a sense of a concept or idea.

Question: can i cite wikipedia in a research paper?

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Answer: no

Text: The cake has a firm yet light texture. It is eaten with tea or (occasionally) for breakfast and is traditionally flavoured with lemon. Dating back to an original recipe in the 18th or 19th century, Madeira cake is similar to a pound cake or yellow cake. One of the earliest published recipes was by Eliza Acton in her Modern Cookery for Private Families (1845):

Question: is pound cake the same as madeira cake?

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Answer: no

Text: In older generation diesel-engine vehicles, unlike in a gasoline-engine vehicle, for a 'cold start' the operator did not simply turn the key to the ''start'' position and have the engine immediately start. Instead, the operator activated the glow plug(s) for a time first. Early diesels used the 'Thermostart' type glowplug in the inlet manifold. These take 20 seconds to achieve working temperature and the vehicle operator had to manually time (or guess) when the 20 seconds had elapsed. With in-cylinder glow plugs, technological improvements included a warning light on the dash to indicate how long the preheating should last. The preheating phase was also made to be automatically activated when the operator turned the key to the ''on'' position for a long duration; the glowplug relay switches the glowplugs on, and a light (see picture at right) on the instrument cluster illuminates. This process is called ''pre-heating'' or ''glowing''. Many modern diesels automatically activate their glow plugs when the operator unlocks the vehicle or opens the door to the car, thus simplifying the process and shortening the time the operator has to wait before the engine will start. According to Bosch: ''Older engines with Thermostart manifold plugs used a glow period of up to 20 seconds whereas more modern engines use around a 6 to 8 second heat period and provide after glow at a reduced voltage.''

Question: do glow plugs stay on all the time?

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Answer:
no