Context: Death from laughter is a rare form of death, usually resulting from cardiac arrest or asphyxiation, caused by a fit of laughter. Instances of death by laughter have been recorded from the times of ancient Greece to the modern day.
 Question: can you have a heart attack from laughing Context: 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.
 Question: is the focal length of a convex lens negative Context: Genetic sexual attraction (GSA) is a term for an overwhelming sexual attraction that may develop between close blood relatives who first meet as adults.
 Question: can siblings fall in love with each other Context: With the box office success of Batman Forever in June 1995, Warner Bros. immediately commissioned a sequel. They hired director Joel Schumacher and writer Akiva Goldsman to reprise their duties the following August, and decided it was best to fast track production for a June 1997 target release date, which is a break from the usual 3-year gap between films. Schumacher wanted to homage both the broad camp style of the 1960s television series and the work of Dick Sprang. The storyline of Batman & Robin was conceived by Schumacher and Goldsman during pre-production on A Time to Kill. Portions of Mr. Freeze's back-story were based on the Batman: The Animated Series episode ``Heart of Ice'', written by Paul Dini.
 Question: is batman and robin a sequel to batman forever Context: In 1996 and 1997 a Witcher video game was being developed by Metropolis Software in Poland, but it was cancelled. The game's director was Adrian Chmielarz, former People Can Fly co-owner and creative director, who coined the translation ``The Witcher'' during its development. According to Chmielarz, the game would have been a 3D action-adventure game with role-playing elements such as moral choices and experience points. In 2007, Polish video-game developer CD Projekt Red released The Witcher, a role-playing game based on Sapkowski's saga. The game was released in Europe on October 26 and in the US on October 30 for Windows and OS X. It was well-publicized and, although it was the developer's first game, it received critical praise in Europe and North America. The Witcher was published in Poland by CD Projekt and worldwide by Atari. A console version, The Witcher: Rise of the White Wolf with the same story and a different engine and combat system, was scheduled for release in fall 2009 but was cancelled that spring.
 Question: is the witcher 3 based on a book
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Yes