user: Question: What is the Elmers End with a 17:57 Selsdon time?
Columns: ['Sanderstead', 'Selsdon', 'Coombe Road', 'Bingham Road', 'Woodside', 'Elmers End']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Morning Peak', 'Morning Peak', 'Morning Peak', 'Morning Peak', 'Morning Peak', 'Morning Peak']
SQL:

assistant: SELECT "Elmers End" FROM "Table" WHERE "Selsdon" = '17:57';