{"blocks": [{"key": "46773c8b", "text": "Question", "type": "header-two", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}, {"key": "aff1c6b0", "text": "Design a query-generation system that maximizes click-through rate (CTR). Discuss architecture, data ingestion, feature engineering, model training/serving, feedback loop, and online/offline evaluation metrics.", "type": "unstyled", "depth": 0, "inlineStyleRanges": [], "entityRanges": [], "data": {}}], "entityMap": {}}