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 candlelight vigil or candlelit vigil is an outdoor assembly of people carrying candles, held after sunset in order to show support for a specific cause. Such events are typically held either to protest the suffering of some marginalized group of people, or in memory of the dead. In the latter case, the event is often called a candlelight memorial. A large candlelight vigil will usually have invited speakers with a public address system and may be covered by local or national media. Speakers give their speech at the beginning of the vigil to explain why they are holding a vigil and what it represents. Vigils may also have a religious or spiritual purpose. On Christmas Eve many churches hold a candlelight vigil.
 Question: do you bring a candle to a candlelight vigil Context: Currently, federal law requires background checks (through the National Instant Criminal Background Check System) only for guns sold through licensed firearm dealers, which account for 78% of all gun sales in the United States. This figure was published in a 2017 study by the Annals of Internal Medicine which compared data from 1994, indicating 40% of recent gun acquisitions were completed without a background check, to a 2015 survey which found that 22% of recent gun transfers (purchased and nonpurchased) were completed without a background check. The current federal law allows people not ``engaged in the business'' of selling firearms to sell firearms without a license or records. The Coalition to Stop Gun Violence (CSGV) states that the National Instant Criminal Background Check System has prevented over two million felons and other prohibited persons from purchasing firearms. According to the CSGV, the law also has a prohibitive effect, that deters illegal purchases.
 Question: are there background checks for guns in america Context: Most of Facebook's acquisitions have primarily been ``talent acquisitions'' and acquired products are often shut-down. Facebook CEO Mark Zuckerberg has stated in 2010 that ``We have not once bought a company for the company. We buy companies to get excellent people... In order to have a really entrepreneurial culture one of the key things is to make sure we're recruiting the best people. One of the ways to do this is to focus on acquiring great companies with great founders.'' The Instagram acquisition, announced on 2012-04-09, appears to have been the first exception to this pattern. While continuing with a pattern of primarily talent acquisitions, other notable product focused acquisitions include the $19 billion WhatsApp acquisition and the $2 billion Oculus VR acquisition.
 Question: is facebook and instagram owned by the same company Context: There are a wide variety of cooking oils from plant sources such as olive oil, palm oil, soybean oil, canola oil (rapeseed oil), corn oil, peanut oil and other vegetable oils, as well as animal-based oils like butter and lard.
 Question: are cooking oil and vegetable oil the same
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