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: A Reservation Against Cancellation (RAC) is a type of ticket that can be sold for travel on the Indian Railways. Although it ensures certainty of travel, it does not guarantee a berth. A berth will be allocated to the person who reserves an RAC ticket if passengers who already have a confirmed ticket do not turn up before the train departure or get their confirmed ticket cancelled. A berth is split into 2 seats for 2 RAC ticket holders. If there's any last minute cancellations, or if any quota allocations remain unsold, or if any confirmed ticket holders are given a free upgrade (more later), an RAC ticket holder is given the empty berth, the other RAC ticket holder can then convert the 2 seats into a berth.
 Question: can rac e ticket holder board the train Context: Straight Talk is another operator, through a partnership between TracFone and Walmart, offering several different rate plans; a $30 limited plan, $35, $45, and $55 30-day unlimited plans and a $60 unlimited international calling plan. Discounts are available for purchasing multiple months of the unlimited plan. Straight Talk is a Mobile Virtual Network operator (MVNO) offering both CDMA and GSM support. The CDMA network uses Verizon's or Sprint's CDMA 1xRTT wireless networks and the GSM side makes use of either T-Mobile's or AT&T's GSM networks.
 Question: can i use a tracfone on straight talk Context: The Cystic Fibrosis Foundation (CFF) is a 501(c)(3) non-profit organization in the United States established to provide the means to cure and control cystic fibrosis (CF). The Foundation provides information about cystic fibrosis and finances CF research that aims to improve the quality of life for people with the disease. The Foundation also engages in legislative lobbying for cystic fibrosis.
 Question: is the cystic fibrosis foundation a non profit Context: In economics, returns to scale and economies of scale are related but different terms that describe what happens as the scale of production increases in the long run, when all input levels including physical capital usage are variable (chosen by the firm). The term returns to scale arises in the context of a firm's production function. It explains the behavior of the rate of increase in output (production) relative to the associated increase in the inputs (the factors of production) in the long run. In the long run all factors of production are variable and subject to change due to a given increase in size (scale). While economies of scale show the effect of an increased output level on unit costs, returns to scale focus only on the relation between input and output quantities.
 Question: is increasing returns to scale the same as economies of scale Context: Thrust SSC holds the world land speed record, set on 15 October 1997, when it achieved a speed of 1,228 km/h (763 mph) and became the first land vehicle to officially break the sound barrier.
 Question: has anyone broken the sound barrier on land
Yes
Yes
Yes
Yes
No
Yes