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                | sample publication 
   |  | Entrez Taxonomy 
 
    
        | The chicken (Gallus gallus) is a type of domesticated fowl, believed
            to be descended from the wild Indian and south-east Asian Red
            Junglefowl. 
 With a population of more than 24 billion in 2003, there are more
            chickens in the world than any other bird. They are used to produce
            two sources of food: their meat, and their eggs.
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