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: Singapore's selection as the host of the 28th Southeast Asian Games of 2015 was announced in 2011 during the 26th Southeast Asian Games, held in Indonesian cities Palembang and Jakarta. Singapore had previously been nominated to host the event in 2007 and 2013, but turned down both opportunities citing costs associated with the construction of the new Singapore Sports Hub. 
 Question: What happened first: 26th Southeast Asian Games or 28th Southeast Asian Games?
[EX A]: 26th southeast asian games

[EX Q]: Context: Lets explore the domain, the least specific category of classification. All of life can be divided into three domains, based on the type of cell of the organism: 1. Bacteria: cells do not contain a nucleus. 2. Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. 3. Eukarya: cells do contain a nucleus. The Archaea and Bacteria domains ( Figure 1.1) are both entirely composed of small, single-celled organisms and seem very similar, but they also have significant differences. Both are composed of prokaryotic cells, which are cells without a nucleus. In addition, both domains are composed of species that reproduce asexually ( asexual reproduction) by dividing in two. Both domains also have species with cells surrounded by a cell wall, however, the cell walls are made of different materials. Bacterial cell walls contain the polysaccharide peptidoglycan. Lastly, Archaea often live in extreme environments including hot springs, geysers, and salt flats. Bacteria do not live in these environments. The Group A Streptococcus organism (left) is in the domain Bacteria, one of the three domains of life. The Halobacterium (right) is in the domain Archaea, another one of the three domains. All of the cells in the domain Eukarya keep their genetic material, or DNA, inside the nucleus. The domain Eukarya is made up of four kingdoms: 1. Plantae: Plants, such as trees and grasses, survive by capturing energy from the sun, a process called photo- synthesis. 2. Fungi: Fungi, such as mushrooms and molds, survive by "eating" other organisms or the remains of other organisms. These organisms absorb their nutrients from other organisms. 3. Animalia: Animals also survive by eating other organisms or the remains of other organisms. Animals range from tiny ants to the largest whales, and include arthropods, fish, amphibians, reptiles, and mammals ( Figure 4. Protista: Protists are not all descended from a single common ancestor in the way that plants, animals, and fungi are. Protists are all the eukaryotic organisms that do not fit into one of the other three kingdoms. They include many kinds of microscopic one-celled (unicellular) organisms, such as algae and plankton, but also giant seaweeds that can grow to be 200 feet long. Plants, animals, fungi, and protists might seem very different, but remember that if you look through a microscope, you will find similar cells with a membrane-bound nucleus in all of them. These are eukaryotic cells. These cells also have membrane-bound organelles, which prokaryotic cells lack. The main characteristics of the three domains of life are summarized in Table 1.1. Multicelluar Cell wall Nucleus (Membrane- Enclosed DNA) Membrane-Bound Organelles Archaea No Yes, without peptidogly- can Bacteria No Yes, with peptidoglycan No No Eukarya Yes Varies. Plants and fungi have a cell wall; animals do not. Yes No No Yes Diversity of Animals. These photos give just an inkling of the diversity of organisms that belong to the animal kingdom. (A) Sponge, (B) Flatworm, (C) Flying Insect, (D) Frog, (E) Tiger, (F) Gorilla. 
 Question: if you find a single-celled organism living in a geyser, it probably belongs to which domain?
[EX A]: archaea

[EX Q]: Context: Gaucher disease is an inborn recessive autosomal disease due to a partial deficiency of the lysosomal enzyme beta glucocerebrosidase. The deficient activity leads to accumulation of the lipid glucocerebroside in the liver, the spleen and bone marrow with concomitant anemia and thrombocytopenia. Patients with Gaucher disease have been classified in three types: type I is the more common, neurological manifestations occur in types II and III. Enzyme replacement therapy (ERT) with modified placental human glucocerebrosidase (ceredase) or recombinant glucocerebrosidase (cerezyme) is effective in most type I Gaucher disease and has become the current standard care administered to thousand of patients worldwide. ERT has obviated the need for bone marrow transplantation and virtually eliminated the need for splenectomy. We report here the French study including adults and children. ERT of 30 to 60 U/K every two weeks as starting dose was administrated to 108 patients with severe type I Gaucher disease. ERT fully reverse many of the manifestations of the disease. ERT regimen alleviated fatigue, and hematological and visceral signs and symptoms in nearly all severely-ill patients. Skeletal responses to treatment develop much more slowly than hematological or visceral responses. Studies in pediatrics show that the disease is more severe in children. These children should be treated early in the course of their disease to avoid irreparable damage. Hematological manifestation in type II cannot be reversed with enzyme replacement. In type III treatment can rarely reverse neurological deficit. Gaucher disease is also an excellent candidate for gene therapy. 
 Question: Which enzyme is deficient in Gaucher's disease?
[EX A]:
beta glucocerebrosidase