TASK DEFINITION: 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.
PROBLEM: Context: When you take a walk along a beach, what do you find there? Sand, the ocean, lots of sunlight. You may also find shells. The shells you find are most likely left by organisms in the phylum Mollusca. On the beach, you can find the shells of many different mollusks ( Figure 1.1), including clams, mussels, scallops, oysters, and snails. Mollusks are invertebrates that usually have a hard shell, a mantle, and a radula. Their glossy pearls, mother of pearl, and abalone shells are like pieces of jewelry. Some mollusks, such as squid and octopus, do not have shells. The Mollusks body is often divided into different parts ( Figure 1.2): On the beach, you can find a wide variety of mollusk shells. 1. A head with eyes or tentacles. 2. In most species, a muscular foot, which helps the mollusk move. Some mollusks use the foot for burrowing into the sand, and others use it for jet-propulsion. 3. A mantle, or fold of the outer skin lining the shell. The mantle often releases calcium carbonate, which creates an external shell, just like the ones you find on the beach. The shell is made of chitin, a tough, semitransparent substance. 4. A mass housing the organs. 5. A complete digestive tract that begins at the mouth and runs to the anus. 6. Most ocean mollusks have a gill or gills to absorb oxygen from the water. 7. Many species have a feeding structure, the radula, found only in mollusks. The radula can be thought of as a "tongue-like" structure. The radula is made mostly of chitin. Types of radulae range from structures used to scrape algae off of rocks to the beaks of squid and octopuses. This is the basic body plan of a mollusk. Note the mantle, gills, and radula. Keep in mind the basic body plan can differ slightly among the mollusks. Mollusks are probably most closely related to organisms in the phylum Annelida, also known as segmented worms. This phylum includes the earthworm and leech. Scientists believe these two groups are related because, when they are in the early stage of development, they look very similar. Mollusks also share features of their organ systems with segmented worms. Unlike segmented worms, however, mollusks do not have body segmentation. The basic mollusk body shape is usually quite different as well. 
 Question: the foot of a squid is probably used for

SOLUTION: jet-propulsion.

PROBLEM: Context: Clay gets up from his trailer at the beach and drives to Mr. Jimmy's lush house, where he mows the lawn.Mr. Jimmy has a visit from David, who is concerned about his health. He then goes out to chat with Clay, his new gardener, and invites him to swim in the pool after he is done working. Clay says he needs to do another lawn later.An academic named Edmund Kay comes to visit Mr. Jimmy, and expresses his deep enthusiasm for his films. Jimmy takes him out back to the pool, and recalls his youth in London, and then his movement into movies and on to Hollywood.Mr. Jimmy becomes bored with Kay's questions, and suggests that Kay begin removing clothing in exchange for his answers. Kay begins disrobing to each of Jimmy's tales about homosexuals in Hollywood and making Frankenstein.Jimmy then gets lightheaded and needs Kay's help to get inside and lie down. His maid Hanna scolds him for chasing boys after just returning from the hospital.Jimmy goes to a doctor who explains that he had a stroke which has left his brain somewhat impaired.Jimmy sees Clay working out in the garden and invites him to talk over iced tea in his painting studio. Jimmy tells him he directed the first two Frankenstein movies, and they talk about his paintings. Jimmy tells Clay he has an expressive head and asks him to model for pay; Clay agrees.Clay arrives at Jimmy's house and Hanna asks if he is going to hurt him. Clay is confused, and she withdraws the question. Clay sits down in the studio to model for Jimmy, who asks him to remove his shirt, even though he only plans to draw his face. Jimmy begins to draw, telling Clay of a memory he has about eating fat drippings as a poor child. He explains how different he was from his family, more talented, more intelligent.Clay goes to a bar and boasts that a famous director is drawing him. Betty the bartender, whom Clay has slept with, turns on The Bride of Frankenstein on TV; meanwhile, Jimmy watches at home with Hanna. The others at the bar criticize the film for not being scary. Clay seems to understand the monster's feelings of loneliness.Flashback: Jimmy directs the performers on the set of Bride of Frankenstein.Clay and Betty talk outside the bar, and he gets upset that she does not want to sleep with him again.Clay calls his parents from a payphone but does not want to talk much.Jimmy dreams that Clay is Dr. Frankenstein, replacing his brain and electrifying him.Hanna tells Clay that Jimmy would like him to have lunch. The two talk as she cooks, and Hanna tells him he should be married. Hanna tells Clay that Jimmy commits unspeakable sins of the flesh, buggery. She is surprised that Clay did not know.Jimmy and Clay have a rather fancy lunch. Jimmy tells Clay that he had hoped Bride of Frankenstein would be seen as a comedy. Jimmy asks Clay to pose for an hour after lunch, and he declines. Jimmy explains that he had a "husband" named David, and Clay asks about his homosexuality. They smoke cigars, and Clay agrees to pose.During the sitting, Jimmy talks about how he made the successful Show Boat and then tried to make his WWI masterpiece The Road Back but the studio butchered it. He says he always wanted to go back to movies, but that was the end. He also broke up with David thereafter. Jimmy begins to describe how he used to have many male models, all naked, which upsets Clay so much he gets mad and storms out.Clay goes to Betty's bar but she is not there. He finds another woman and has sex with her in the parking lot.Clay returns to Jimmy's house and says he will sit for him again if he eases up on the locker room talk. Jimmy is curious that Clay has never known any gay men before, not even when he was in the Marines. Jimmy recalls a young soldier from WWI he mentored in the trenches, then becomes quite upset, looking at Clay intensely 
 Question: Who is befriend with handsome gardener and former Marine?

SOLUTION: jimmy

PROBLEM: Context: The Ehlers-Danlos syndrome is characterized by abnormal connective tissue but bone involvement is debated. We found a reduced BMD and bone quality and increased prevalence of asymptomatic vertebral fractures in eugonadal patients with Ehlers-Danlos syndrome. These findings suggest the need of a bone health evaluation in these patients. The Ehlers-Danlos (EDS) syndrome is characterized by abnormalities of the connective tissue leading to ligamentous laxity and skin and tissue fragility. We evaluated the bone metabolism, bone mineral density (BMD) and bone quality (measured by trabecular bone score, TBS), and the prevalence of vertebral fractures (VFx) in a group of eugonadal adult EDS patients. Fifty consecutive Caucasian patients, aged 30-50years (36 females, 14 males) with classical or hypermobility EDS and 50 age-, gender-, and body mass index (BMI)-matched control subjects were enrolled. In all subjects' calcium-phosphorous metabolism, bone turnover, BMD at the lumbar spine (LS) and femur (femoral neck, FN and total femur, FT) and TBS by dual-energy X-ray absorptiometry, and the VFx presence by spine radiograph were assessed. Patients showed reduced BMD (Z-scores LS -0.451.00, FN -0.561.01, FT -0.580.92) and TBS (1.2990.111) and increased prevalence of morphometric VFx (32%) than controls (Z-scores LS 0.091.22, FN 0.010.97, FT 0.080.89; TBS 1.3820.176; VFx 8%, p <0.05 for all comparisons), while vitamin D levels, calcium-phosphorous metabolism, and bone turnover were comparable. Fractured EDS patients showed lower TBS values than non-fractured ones (1.2450.138 vs 1.3250.086, p<0.05), despite comparable BMD. In EDS patients, the VFx presence was significantly associated with TBS even after adjusting for sex, age, BMD, EDS type, and falls frequency. EDS patients have reduced BMD and bone quality (as measured by TBS) and increased prevalence of VFx. 
 Question: What tissue is most affected in Ehlers-Danlos syndromes?

SOLUTION:
connective tissue