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: Damon wakes up chained on the Salvatore house's basement. Stefan is there and Damon tries to warn him that because of his cravings, one day he will kill him but Stefan tells him that they will find a solution. Damon points to Stefan that ``Elena'' provoked him to feed on her and then she kicked a stake towards him so he will kill him. Stefan does not believe that Elena would want that, he locks Damon up and gets upstairs where Caroline is. The two of them discuss what happened between Stefan and ``Elena'' and Caroline also tells him about Nadia and Matt and the text he sent to her. From Matt's text, who used ``K'' and not ``E'', they put the pieces together and they realize that Katherine is in Elena's body.
 Question: do they find out that katherine is in elena's body Context: After the final episode of Series 1, (April 2018), and with the storyline ending on some significant 'cliff-hangers', the voice-over states that a second series is in development; in an interview with BBC Breakfast, Eve Myles said that Matthew Hall is writing the scripts for the second series. On 6 May 2018, Huw Thomas, BBC Wales arts and media correspondent, wrote ``A second series is in development, but has not yet been commissioned. The BBC has yet to confirm if the drama will be shown on network TV across the UK.''
 Question: will there be a series 2 of keeping faith Context: Citric acid was first isolated in 1784 by the chemist Carl Wilhelm Scheele, who crystallized it from lemon juice. It can exist either in an anhydrous (water-free) form or as a monohydrate. The anhydrous form crystallizes from hot water, while the monohydrate forms when citric acid is crystallized from cold water. The monohydrate can be converted to the anhydrous form at about 78 °C. Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C. It decomposes with loss of carbon dioxide above about 175 °C.
 Question: is lemon juice the same as citric acid Context: Brazil is the most successful national team in the history of the World Cup, having won five titles, earning second-place, third-place and fourth-place finishes twice each. Brazil is one of the countries besides Argentina, Spain and Germany to win a FIFA World Cup away from its continent (Sweden 1958, Mexico 1970, USA 1994 and South Korea/Japan 2002). Brazil is the only national team to have played in all FIFA World Cup editions without any absence or need for playoffs. Brazil also has the best overall performance in World Cup history in both proportional and absolute terms with a record of 73 victories in 109 matches played, 124 goal difference, 237 points and only 18 losses.
 Question: has brazil always qualified for the world cup
Yes
Yes
Yes
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Yes