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.

Example Input: Context: Charles Wilson Cross died of a heart attack June 2, 1928, in Calgary. 
 Question: What was Charles Wilson Cross's cause of death?
Example Output: heart attack

Example Input: Context: Facioscapulohumeral muscular dystrophy (FSHD) is one of the most prevalent adult muscular dystrophies. The common clinical signs usually appear during the second decade of life but when the first molecular dysregulations occur is still unknown. Our aim was to determine whether molecular dysregulations can be identified during FSHD fetal muscle development. We compared muscle biopsies derived from FSHD1 fetuses and the cells derived from some of these biopsies with biopsies and cells derived from control fetuses. We mainly focus on DUX4 isoform expression because the expression of DUX4 has been confirmed in both FSHD cells and biopsies by several laboratories. We measured DUX4 isoform expression by using qRT-PCR in fetal FSHD1 myotubes treated or not with an shRNA directed against DUX4 mRNA. We also analyzed DUX4 downstream target gene expression in myotubes and fetal or adult FSHD1 and control quadriceps biopsies. We show that both DUX4-FL isoforms are already expressed in FSHD1 myotubes. Interestingly, DUX4-FL expression level is much lower in trapezius than in quadriceps myotubes, which is confirmed by the level of expression of DUX4 downstream genes. We observed that TRIM43 and MBD3L2 are already overexpressed in FSHD1 fetal quadriceps biopsies, at similar levels to those observed in adult FSHD1 quadriceps biopsies. These results indicate that molecular markers of the disease are already expressed during fetal life, thus opening a new field of investigation for mechanisms leading to FSHD. 
 Question: Which disease is associated with the ectopic expression of the protein encoded by the gene DUX4?
Example Output: fshd

Example Input: Context: After the 2004 Asian tsunami disaster, four independent volunteers, with little money and no experience, race off to volunteer in tsunami ravaged Sri Lanka. They meet up by fate at the Colombo airport and form a volunteer team. They rent a van, fill it with supplies and start driving down the coast to see where they can help. They stumble into a tribal village called Peraliya, which has been destroyed by a forty foot wave. During the time the wave hit Peraliya, a train called "The Queen of the Sea" was passing by and was washed away killing over 2500 passengers and villagers. The Four volunteers set up a first aid station and found themselves in charge of running a refugee camp with over 3000 people. Their initial two week journey turns into a year long odyssey of heartbreak and hope as the villagers turn against them when donated tsunami relief money does not materialize. The volunteers concentrate on the bigger picture and break every rule in the 'Disaster Aid Books'. 
 Question: How many people are in the refugee camp?
Example Output:
over 3000 people.