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: Mamma Mia! is based on the songs of ABBA, a Swedish pop/dance group active from 1972 to 1982 and one of the most popular international pop groups of all time, topping the charts again and again in Europe, North and South America and Australia. Following the premiere of the musical in London in 1999, ABBA Gold topped the charts in the United Kingdom again. This musical was the brainchild of producer Judy Craymer. She met songwriters Björn Ulvaeus and Benny Andersson in 1983 when they were working with Tim Rice on Chess. It was the song ``The Winner Takes It All'' that suggested to her the theatrical potential of their pop songs. The songwriters were not enthusiastic, but they were not completely opposed to the idea.
 Question: did abba make the songs for mamma mia Context: The Gulf of Mexico (Spanish: Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. The U.S. states of Texas, Louisiana, Mississippi, Alabama, and Florida border the Gulf on the north, which are often referred to as the ``Third Coast'', in comparison with the U.S. Atlantic and Pacific coasts.
 Question: is the gulf of mexico the atlantic ocean Context: North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere; it is also considered by some to be a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea.
 Question: is the united states of america in the northern hemisphere Context: The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones that support the appendages. Appendages appeared as fins in early fish, and subsequently evolved into the limbs of tetrapods. The appendicular skeleton includes the skeletal elements within the limbs, as well as supporting pectoral and pelvic girdles in the case of tetrapods (these are lacking in fish). The word appendicular is the adjective of the noun appendage, which itself means a part that is joined to something larger.
 Question: pelvic girdle is part of the appendicular skeleton Context: Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere.The motivating force for seafloor spreading ridges is tectonic plate pull rather than magma pressure, although there is typically significant magma activity at spreading ridges. At a spreading center basaltic magma rises up the fractures and cools on the ocean floor to form new seabed. Hydrothermal vents are common at spreading centers. Older rocks will be found farther away from the spreading zone while younger rocks will be found nearer to the spreading zone. Additionally spreading rates determine if the ridge is a fast, intermediate, or slow. As a general rule, fast ridges see spreading rate of more than 9 cm/year. Intermediate ridges have a spreading rate of 4--9 cm/year while slow spreading ridges have a rate less than 4 cm/year.
 Question: in general the ocean floor is younger than the rocks on the continents
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