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: Christianson syndrome (CS) is an X-linked neurodevelopmental and neurological disorder characterized in males by core symptoms that include non-verbal status, intellectual disability, epilepsy, truncal ataxia, postnatal microcephaly and hyperkinesis. CS is caused by mutations in the SLC9A6 gene, which encodes a multipass transmembrane sodium (potassium)-hydrogen exchanger 6 (NHE6) protein, functional in early recycling endosomes. The extent and variability of the CS phenotype in female heterozygotes, who presumably express the wild-type and mutant SLC9A6 alleles mosaically as a result of X-chromosome inactivation (XCI), have not yet been systematically characterized. Slc9a6 knockout mice (Slc9a6 KO) were generated by insertion of the bacterial lacZ/-galactosidase (-Gal) reporter into exon 6 of the X-linked gene. Mutant Slc9a6 KO male mice have been shown to develop late endosomal/lysosomal dysfunction associated with glycolipid accumulation in selected neuronal populations and patterned degeneration of Purkinje cells (PCs). In heterozygous female Slc9a6 KO mice, -Gal serves as a transcriptional/XCI reporter and thus facilitates testing of effects of mosaic expression of the mutant allele on penetrance of the abnormal phenotype. Using -Gal, we demonstrated mosaic expression of the mutant Slc9a6 allele and mosaically distributed lysosomal glycolipid accumulation and PC pathology in the brains of heterozygous Slc9a6 KO female mice. At the behavioral level, we showed that heterozygous female mice suffer from visuospatial memory and motor coordination deficits similar to but less severe than those observed in X-chromosome hemizygous mutant males. Our studies in heterozygous Slc9a6 KO female mice provide important clues for understanding the likely phenotypic range of Christianson syndrome among females heterozygous for SLC9A6 mutations and might improve diagnostic practice and genetic counseling by helping to characterize this presumably underappreciated patient/carrier group. 
 Question: Mutation of which gene is implicated in the Christianson syndrome?

SOLUTION: slc9a6

PROBLEM: Context: It seems that the Great Wall is the place to rock . There will be two parties held on the Great Wall this month. Great Wall I The latest Great Wall party is sponsored by the Club and Elektrobeat and held at Jinshanling. Local DJ Mark, as well as guests Slab from Australia, Usami and Bobby from Hong Kong will sing at the party. All drinks are priced at 20 yuan($ 2.4). Tickets: 200yuan($ 24), including bus ride there and back plus entrance fee to the Great Wall. T/D: 8p.m. to 2 a.m., Sept. 20. Pre-sale tickets are to be booked at: Public Space: 6416-0759; Neo Lounge: 6416-1077. Buses: Leave at 5 p.m. on Saturday, Sept. 20 from Neo Lounge, 99 Xinfuncun Zhonglu, Sanlitun, Chaoyang District. For more info: www. elektrobeat. com Great wall II The other party at the end of this month at Jinshanling will be started with live performances by Askar, Brain Failure, Longkuan, Supermarket, Mr. Zhou, Beijing Talking and the Yi band. Dance till dawn to the wonderful sounds of DJs Ben, Mickey Zhang, Will, Cheese, Gao Hu and Huang Weiwei. T/D: 8 p.m. to 2 a.m., Sept. 27. Tickets: 350 yuan ($ 42) or 300 yuan ($ 36) for groups of 10 or more, 500 yuan ($ 60) at the door and VIP tickets 800 yuan ($ 72), transportation included. Buses: Depart from the north gate of Wbrkers' Stadium at noon, 2 p.m., 4 p.m., Sept. 27. For more info: contact Li Zhenhua at lah@msgp. Org or call 133-2119-1731. 
 Question: What day of the week is September 27?

SOLUTION: saturday.

PROBLEM: Context: Fat on human body is distributed in two different ways. Some fat people have a large chest and no waistline , looking rather like apples. Others are fatter below the waist, looking more like pears. Doctors in Cambridge, England have been examining the relationship between health and fat distribution. They find that the pear-shaped fat people have fewer problems than the apple-shaped people. What seems to be most important is not just how much fat you have but where you have it. The doctors measured the apple-shaped women and pear-shaped women and examined them with X-ray scanners (X). Human beings have two types of fat, one is outside fat that is the fat below the skin and the other is inside fat that lies inside the body. Using the X-ray scanners, the doctors found that the "apples" have a large amount of inside fat. If this inside fat is much more than outside fat, it will probably cause health problems such as obesity . The best treatment for obesity is to reduce the inside fat. But unfortunately diet treatment simply makes an apple-shaped person into a smaller apple and a pear-shaped person into a smaller pear. At the moment there is no effective way of reducing the inside fat. 
 Question: If you are fatter below your hip you are

SOLUTION:
a pear-shaped person