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 Input:
Context: The immune system usually protects you from pathogens and other causes of disease. When the immune system is working properly, it keeps you from getting sick. But the immune system is like any other system of the body. It can break down or develop diseases. AIDS is an infectious disease of the immune system caused by a virus. Some diseases of the immune system are noninfectious. They include autoimmune diseases and allergies. Does it make sense for an immune system to attack the cells it is meant to protect? No, but an immune system that does not function properly will attack its own cells. An autoimmune disease is a disease in which the immune system attacks the bodys own cells. One example is type 1 diabetes. In this disease, the immune system attacks cells of the pancreas. Other examples are multiple sclerosis and rheumatoid arthritis. In multiple sclerosis, the immune system attacks nerve cells. This causes weakness and pain. In rheumatoid arthritis, the immune system attacks the cells of joints. This causes joint damage and pain. Autoimmune diseases cannot be cured. But they can be helped with medicines that weaken the immune systems attack on normal cells. Other autoimmune diseases include celiac disease (damages to the small intestine), inflam- matory bowel disease (damage to the digestive tract), psoriasis (damage to the skin), and lupus (damage to the joints, skin, kidneys, heart, and lungs). An allergy occurs when the immune system attacks a harmless substance that enters the body from the outside. A substance that causes an allergy is called an allergen. It is the immune system, not the allergen, that causes the symptoms of an allergy. Did you ever hear of hay fever? Its not really a fever at all. Its an allergy to plant pollens. People with this type of allergy have symptoms such as watery eyes, sneezing, and a runny nose. A common cause of hay fever is the pollen of ragweed. Many people are also allergic to poison ivy ( Figure 1.2). Skin contact with poison ivy leads to an itchy rash in people who are allergic to the plant. Ragweed is a common roadside weed found throughout the United States. Many people are allergic to its pollen. Some people are allergic to certain foods. Nuts and shellfish are common causes of food allergies. Other common causes of allergies include: Drugs, such as penicillin. Mold. Dust. The dead skin cells of dogs and cats, called dander. Stings of wasps and bees. Most allergies can be treated with medicines. Medicines used to treat allergies include antihistamines and corticos- teroids. These medicines help control the immune system when it attacks an allergen. Sometimes, allergies cause severe symptoms, a condition known as anaphylaxis. For example, they may cause the throat to swell so it is hard to breathe. Severe allergies may be life threatening. They require emergency medical care. 
 Question: autoimmune diseases can be cured with

Ex Output:
autoimmune diseases cannot be cured.


Ex Input:
Context: In the present study, we tested the hypothesis that having migraine in middle age is related to late-life parkinsonism and a related disorder, restless legs syndrome (RLS), also known as Willis-Ekbom disease (WED). The AGES-Reykjavik cohort (born 1907-1935) has been followed since 1967. Headaches were classified based on symptoms assessed in middle age. From 2002 to 2006, 5,764 participants were reexamined to assess symptoms of parkinsonism, diagnosis of Parkinson disease (PD), family history of PD, and RLS/WED. Subjects with midlife migraine, particularly migraine with aura (MA), were in later life more likely than others to report parkinsonian symptoms (odds ratio [OR]MA = 3.6 [95% CI 2.7-4.8]) and diagnosed PD (ORMA = 2.5 [95% CI 1.2-5.2]). Women with MA were more likely than others to have a parent (ORMA = 2.26 [95% CI 1.3-4.0]) or sibling (ORMA = 1.78 [95% CI 1.1-2.9]) with PD. Late-life RLS/WED was increased for headache generally. Associations were independent of cardiovascular disease and MRI-evident presumed ischemic lesions. These findings suggest there may be a common vulnerability to, or consequences of, migraine and multiple indicators of parkinsonism. Additional genetic and longitudinal observational studies are needed to identify candidate pathways that may account for the comorbid constellation of symptoms. 
 Question: Willis-Ekbom disease is also known as?

Ex Output:
restless legs syndrome


Ex Input:
Context: Sarah Williams (Jennifer Connelly) was a teenager with a large imagination and love for fantasy stories, so much so that she enacted her favorite storybook, the Labyrinth, whenever she could. She happened to have been pretending that she was the heroine in her story while wandering in the park near her house when the clock on the near by city hall building struck, informing her it was 7pm. She realized she was an hour late and needed to get home to watch her baby stepbrother, Toby (Toby Froud). After arguing with her stepmother about her tardiness and feeling ignored by her father, Sarah was left alone with her fussy infant brother. Angered that her stepmother had given her brother one of her favorite teddy bears, a tattered toy called Lancelot, Sarah shouted into the air for someone to take her away from 'this awful place.' To get Toby to stop crying, she told him the story of how the Goblin King was in love with the girl who was 'forced to stay at home with the baby' and that he had 'given her certain powers.' But Sarah in no way believed this story could be real.In anger that the child wouldn't stop crying, Sarah did call for the goblins to take her brother. They took Toby away and Jareth (David Bowie), the King of the Goblins, gave her an option; she could take her dreams or spend 13 hours in his kingdom, an ever-changing maze called the Labyrinth. If she was able to get to the castle at the center within the specified time, her brother would be spared from becoming a goblin. Sarah was resolved to save her brother and the king left her to do her task.She immediately met an ancient looking dwarf with a feisty attitude who showed her how to enter the Labyrinth. His name was Hoggle (voice Brian Henson) and he told her not to take anything for granted in that place; she didn't seem to find him very helpful and basically told him to leave. However, eventually she got herself stuck in an oubliette, and the one sent by the Goblin King to 'rescue' her was Hoggle.But Hoggle was beginning to like Sarah and against the orders he was given to send her back to the beginning of the Labyrinth, having her start all over again, and therefore be late, he made the choice to help her get to the center and reach her brother. This did not bode well with Jareth, who in umbrage at Sarah's haughty attitude took three hours of her time away and threatened to send Hoggle to the most horrible place known in the Labyrinth for his betrayal, a stinky land of slimy mud called the Bog of Eternal Stench. Then Jareth turned to Sarah and asked her how she was enjoying his Labyrinth. When she flippantly said it was a 'piece of cake,' the king sent a machine covered in spinning knives after her and Hoggle, then disappeared. They were able to escape, yet Hoggle got scared by the sound of a howling creature and said he was a friend to no one but himself, leaving Sarah to fend for herself.Sarah forced herself not to be afraid, remembering she had been told 'things aren't always what they seem in this place.' She found Ludo, a giant furry beast and a gentle creature despite his massive size, who became her friend when she saved him from being tortured by a bunch of goblins. But she became separated from Ludo too and found herself in a strange forest where she met the Firies, creatures that were able to dismember themselves and take off their heads. They tried to take off her head, which of course didn't work, but they didn't stop trying to mutilate her, so she threw their heads away. Hoggle came to her rescue, but she didn't know that the Goblin King had threatened that if she ever kissed him, he would immediately be sent to the Bog. As soon as her lips touched the dwarf's bald head in a kiss of gratitude for being rescued, the stones beneath them shook and they fell to the Bog. Thankfully they did 
 Question: What is the name of the large beast Sarah befriends?

Ex Output:

ludo