{"knowledge_schema": {"broad_category": "Medical Science \u2192 Oncology \u2192 Breast Cancer Treatment", "refinement": "This problem focuses on the effectiveness of PD-1 inhibitors in treating Triple Negative Breast Cancer (TNBC) compared to traditional chemotherapy.", "specific_scope": "The question specifically examines the population groups that benefit from PD-1 inhibitors in terms of overall survival rates.", "goal": "Identify the population group in which PD-1 inhibitors lead to a prolonged overall survival compared to chemotherapy alone."}, "summary": "This question pertains to the treatment of Triple Negative Breast Cancer (TNBC) and the effectiveness of PD-1 inhibitors. It asks which population group experiences prolonged overall survival when treated with PD-1 inhibitors compared to chemotherapy alone. The options include various population classifications based on PD-L1 expression, and the goal is to determine which group benefits most from this treatment."}