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: In mathematics and vector algebra, the cross product or vector product (occasionally directed area product to emphasize the geometric significance) is a binary operation on two vectors in three-dimensional space ( R 3 ) (\displaystyle \left(\mathbb (R) ^(3)\right)) and is denoted by the symbol × (\displaystyle \times ) . Given two linearly independent vectors a (\displaystyle \mathbf (a) ) and b (\displaystyle \mathbf (b) ) , the cross product, a × b (\displaystyle \mathbf (a) \times \mathbf (b) ) , is a vector that is perpendicular to both a (\displaystyle \mathbf (a) ) and b (\displaystyle \mathbf (b) ) and thus normal to the plane containing them. It has many applications in mathematics, physics, engineering, and computer programming. It should not be confused with dot product (projection product).
 Question: is the cross product of two normalized vectors normalized Context: Animal-made art is art created by a non-human animal. Animal-made works of art have been created by apes, elephants, cetacea, reptiles, and bowerbirds, among other species.
 Question: are humans the only animals that create art Context: To be more exact, one acre is 90.75% of a 100-yd-long by 53.33-yd-wide American football field (without the end zones). The full field, including the end zones, covers about 1.32 acres (0.53 ha).
 Question: is an acre equal to a football field Context: In Canada, it is legal to own a crossbow and has a similar designation as an airgun. Weapons of a projectile velocity under 500 FPS may be owned by any person 18 years of age or older. No licence is required to purchase a crossbow. Though older PAL cards say that one is allowed to acquire one, the laws designating them as firearms were struck down before they could be implemented. Crossbows designed to be fired with one hand and crossbows measuring less than 500 mm in length are prohibited.
 Question: is a crossbow considered a firearm in canada Context: Various scripts adapted from Morrell's book had been pitched to studios in the years since its publication but it was only when Stallone decided to become involved with the project that it was finally brought into production. Stallone's star power after the success of the Rocky films enabled him to rewrite the script, to make the character of John Rambo more sympathetic. While Morrell's book has the Rambo character kill many of his pursuers, and Kozoll and Sackheim's draft had him killing sixteen people, in the movie Rambo does not directly cause the death of any police or national guardsmen. Stallone also decided to let Rambo survive the film instead of keeping the book's ending where he dies. A suicide scene was filmed but Kotcheff and Stallone opted to have Rambo turn himself in at Trautman's urging. Stallone did an estimated seven revisions of the script. Kotcheff requested further work be done on the script, which was performed by Larry Gross and David Giler.
 Question: is first blood based on a true story
Yes
Yes
No
No
No
No