The document discusses questions to ask during a reference interview to determine a patron's data needs. It outlines the "5 Ws" - who, what, when, where, and how. For each "W", it provides examples of questions to ask such as who would want the data, what type of source is needed, what time frame and geographic areas are relevant, and how the data was collected and whether there are any limitations or costs. The goal is to understand the patron's request and identify appropriate data sources to meet their needs.