<s>[INST] ### [Challenge] An Abstraction Challenge
While working with a SOAP API, you need to interact with multiple methods of a web service that return lists of data. However, the structure of the data varies significantly from one method to another. How would you create a simplified abstraction layer - one that hides the underlying complexities but allows for simple querying of the data returned from these different services (let's say in an object-oriented library)?[/INST]