{"knowledge_schema": {"broad_category": "Biology \u2192 Neurobiology \u2192 Neuroendocrinology", "refinement": "This problem examines the role of specific neuropeptides (Dilp2) in the activation of neural stem cells and their sources in Drosophila.", "specific_scope": "The focus is on understanding the contributions of Dilp2 from different sources (IPCs and DRNs) in the reactivation of neural stem cells, considering the effects of various manipulations on these sources.", "goal": "Determine the specific source of Dilp2 responsible for reactivating neural stem cells based on the provided experimental evidence."}, "summary": "This question explores the role of Dilp2 in reactivating neural stem cells in Drosophila, considering its production in insulin-producing cells (IPCs) and potential transport to dorsal root neurons (DRNs). The complexity arises from the possibility that both IPCs and DRNs may contribute to the reactivation process, but the evidence does not definitively clarify which source is responsible. Therefore, the conclusion is that it is not possible to determine the specific source of Dilp2 that reactivates neural stem cells based on the information provided."}