user: Question: What does Polyphenyl Ether of 3- and 4-Ring Oxythio look like?
Columns: ['Polyphenyl Ether', 'Appearance', 'Thermal Stability °F (°C)', 'Viscosity (cSt) at 100°F (38°C)', 'Viscosity (cSt) at 210°F (99°C)']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['6-Ring 6P5E', 'Clear Liquid', '836 (447)', 2000.0, 25.0]
SQL:

assistant: SELECT "Appearance" FROM "Table" WHERE "Polyphenyl Ether" = '3- and 4-Ring Oxythio';