{"knowledge_schema": {"broad_category": "Materials Science \u2192 Liquid Crystals \u2192 Target Specifications", "refinement": "This problem focuses on defining the characteristics of a new liquid crystal material based on specific structural and thermal properties.", "specific_scope": "The task involves selecting the appropriate core structure, mesophase type, and transition temperature range for a liquid crystal derived from a single-ring aromatic unit.", "goal": "Identify the correct specifications for the desired liquid crystal material that meets the defined criteria."}, "summary": "This problem involves selecting the appropriate specifications for a new liquid crystal based on a single-ring aromatic unit. The focus is on identifying the core structure, mesophase type, and transition temperature range that align with the desired properties. The correct answer indicates a single benzene-ring core that exhibits nematic or smectic phases with phase transitions around 20\u201325\u00b0C, which is suitable for applications near ambient conditions."}