user: Question: Tell me the lowest prom for class of hewitt and peak of cushat law and height more than 615
Columns: ['Peak', 'Height (m)', 'Prom. (m)', 'Class', 'Parent']
Types: ['text', 'real', 'real', 'text', 'text']
Sample row: ['The Cheviot', 815.0, 556.0, 'Marilyn', 'Broad Law']
SQL:

assistant: SELECT MIN("Prom. (m)") FROM "Table" WHERE "Class" = 'hewitt' AND "Peak" = 'cushat law' AND "Height (m)" > 615.0;