input: Focal length

For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot. For a diverging lens (for example a concave lens), the focal length is negative, and is the distance to the point from which a collimated beam appears to be diverging after passing through the lens.

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is the focal length of a convex lens negative
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output: no
Question: Traditionally, the stage starts with champagne served by the race leader's team, on-the-road photo opportunities and joking around. As the riders approach Paris, the racing heats up as the sprinters and their teams begin the real racing of the day. When the riders reach central Paris, they enter the Champs-Elysees riding up the Rue de Rivoli, on to the Place de la Concorde and then swing right on to the Champs-Elysees itself. The riders ride now a total of 8 laps (up towards the Arc de Triomphe, down the Champs-Elysees, round les Tuileries and the Louvre and across the Place de la Concorde back to the Champs-Elysees). In past Tours, the riders would complete ten laps before the Tour was over. is the last stage of the tour de france a race

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Answer: yes
IN: The Trust owns a number of former military buildings in Jersey. Some of these are listed here.
are there any national trust properties in jersey?

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OUT: yes
What's the best answer to this question: as part of the agricultural adjustment act farmers were paid subsidies?

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Answer: yes
Text: The People of Sparks is a post-apocalyptic science fiction novel by American writer Jeanne DuPrau, published in 2004. It is the second ''Book of Ember'' in the series, and a sequel to The City of Ember; other books in the series include The Prophet of Yonwood and The Diamond of Darkhold.

Question: is there a sequel to the city of ember?

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[separator]
Answer: yes
input: Caste system in India

The caste system in India is the paradigmatic ethnographic example of caste. It has origins in ancient India, and was transformed by various ruling elites in medieval, early-modern, and modern India, especially the Mughal Empire and the British Raj. It is today the basis of educational and job reservations in India. It consists of two different concepts, varna and jati, which may be regarded as different levels of analysis of this system.

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did the british create the caste system in india
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output:
no