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			Choose (selector, ...)
Result Type: depends on parameters
Definition: Returns the value of the (selector + 1)th parameter. If selector is outside the range of parameters supplied, returns the empty string.
 Examples:  Choose(3, "Fi", "Fie", "Fo", "Fum") 
returns “Fo”.
 Choose(X, "ten", 100, 1000, "huge") 
where X has the value 1, returns “ten”.