Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[EX Q]: Context: 35 Leukothea (/ljuki/ lew-KOTH-ee-, Greek: ) is a large, dark asteroid from the asteroid belt It was discovered by German astronomer Karl Theodor Robert Luther on April 19, 1855, and named after Leukothea, a sea goddess in Greek mythology.
Question: Who discovered the 35 Leukothea?
[EX A]: robert luther

[EX Q]: Context: Ryu (Ha-kyun Shin), a deaf man, works in a factory to support his ailing sister (Ji-Eun Lim) in desperate need of a kidney transplant. Ryu tries to donate one of his kidneys to his sister but is told that his blood type does not match that of his sister and so is not a suitable donor. After being laid off from his job by the factory boss, Ryu contacts a black market organ dealer who agrees to sell him a kidney suitable for his sister in exchange for 10,000,000 Korean won, plus one of Ryu's own kidneys. He takes the severance pay from his factory job and offers the money to the organ dealers, who take the money and one of his kidneys, but then disappear. Three weeks later, Ryu learns from his doctor that a kidney has been found for his sister and that the operation will cost 10,000,000 won, but since the organ dealers stole his money, he will not be able to pay for it.In need of money for the operation and in retaliation for his being fired, Ryu and his girlfriend, Yeong-mi (Doona Bae), a radical anarchist, conspire to kidnap the daughter of the boss who fired him. Instead, he realizes that the kidnapping would immediately put them under police suspicion, and they decide to kidnap Yu-sun (Bo-bae Han), the daughter of the boss's friend, Park Dong-jin (Kang-ho Song), another factory executive. The girl stays with Ryu's sister (thinking that Ryu is merely babysitting for a time), who takes care of her while the distraught Dong-jin arranges to pay her ransom. After Ryu collects the money and returns home, he learns that his sister has discovered his scheme and, unwilling to be involved or burden Ryu further, killed herself. Ryu takes Yu-sun and his sister's body into the countryside to bury her by a riverbed they used to frequent as children. While Ryu mourns, Yu-sun accidentally slips into the river and drowns.Days later, as Dong-jin mourns his daughter and swears revenge at the river bank, Ryu ambushes and murders the organ dealers. Dong-jin, having investigated the identities of the kidnappers, finds Yeong-mi and begins interrogating her. Yeong-mi apologizes for Yu-sun's death but warns him of her membership in a terrorist organization that, knowing Dong-jin's identity, will kill him if she dies. Dong-jin, unfazed by the threats, tortures her to death by electrocuting her. Ryu returns to Yeong-mi's apartment building and discovers the police removing her body on a stretcher. Ryu, consumed with grief, swears vengeance on Dong-jin.Ryu arrives at Dong-jin's residence in an attempt to kill him. He waits for some time, but Dong-Jin does not arrive: he is, in fact, waiting at Ryu's apartment. After Dong-Jin does not arrive, Ryu returns to his apartment. However, Dong-jin had previously set up an electric booby trap on his doorknob, which renders Ryu unconscious. Dong-jin then binds Ryu and returns him to the riverbed where Yu-sun died. After binding Ryu's hands and feet and bringing him chest-high into the water, an emotional Dong-jin acknowledges that although Ryu is a good man, he has no choice; Dong-jin then slashes Ryu's Achilles tendons, resulting in his drowning.Dong-jin drags Ryu back to shore and then drives off to a desolate location to bury the body. Once there, he begins to dig a hole, but soon a group of men arrives. They surround and stab Dong-jin repeatedly, finally attaching a note to his chest identifying themselves as the terrorist group of which Yeong-mi was part. The group leave Dong-jin dying beside his car with the bloody tools and bags he used to chop up, dismember, and package Ryu's body.(From Wikipedia.)
Question: How does Yu-sun die?
[EX A]: drowns

[EX Q]: Context: The dark chocolate is one of the favourite food choices by many. The taste is simply irresistible , the smell is inviting and the feel of every bite is surely what you are longing for. Apart from the taste, you simply cannot resist it because it has a lot of benefits when it comes to your health. Our health is our priority when it comes to the choice of our foods. If you worry that the chocolate is bad for your health, then here is a list of the effects of dark chocolate to health especially when taken with the right amount every day. First of all , it contains a component called falconoid which acts as an antioxidant . The antioxidants fight the common signs of aging. The antioxidants are also good for the heart. Studies have shown that people who ate foods rich in antioxidants have low risk of heart diseases. In addition to the anti-aging and healthy heart benefits, the dark chocolate can also lower blood pressure and reduce bad cholesterol to as high as 10%. Lowering of blood pressure in patients of high blood level is good because it will lower the risks of stroke and certain health crisis. Low levels of blood cholesterol are also good for the heart and take away the risk of blood vessels which may harden for too much cholesterol in them. Lastly, do you know the feeling of being overjoyed after jogging? This feeling is like extreme happiness. Dark chocolates will give you the feeling of pleasure and happiness. If you are feeling that the world has turned against you, then a chocolate can be a mood lifter. It can help fight depression. Usually when we feel so bad, we would crave to eat more food. If you are looking for something to eat during your bad moments, try to take a bite from a dark chocolate and feel good somehow after it. These are commonly the effects of chocolates to health. It can benefit you especially if taken in moderate amounts. Approximately, 100 grams of chocolate or less a day is already enough according to studies. If you have taken too much, try to lessen on your other meals for the day. It is all about nutrition and taking the right amount of food in order to get the health benefits that it can provide for you.
Question: What do we consider most important when choosing our foods?
[EX A]:
our health.