If a query returns only one item, you can convert the result from a collection to a single object using the ELEMENT operator. If the SELECT statement returns more than one object, the ELEMENT statement returns an error code and does not convert any objects. The ELEMENT statement is of greatest use for queries embedded in a programming language when you know that you will find exactly one object and when you know the type of the object.
ELEMENT ( SELECT product FROM ProductExtent AS product WHERE product.productName = "Chai" )
The above query will return one product object.