Your question is Getting Data for Complex Requests. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you go about getting the data you need for a complex, unstructured analytical request?
Focus on how you would identify source systems, define grain, validate completeness, and handle missing or ambiguous fields. Explain how you would make the data usable for analysis and how you would prove it is trustworthy.