user: Question: What is the livery of the Steam locomotive built after 1950 with a wheel arrangement of 2-6-2?
Columns: ['Livery', 'Locomotive type', 'Wheel Arrangement', 'Builder', 'Year built']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Highland Railway green', 'Steam', '2-6-2', 'Ravenglass & Eskdale Railway', 1989.0]
SQL:

assistant: SELECT "Livery" FROM "Table" WHERE "Locomotive type" = 'Steam' AND "Year built" > 1950.0 AND "Wheel Arrangement" = '2-6-2';