user: Question: What was the Proposed date of the entry that has a CERCLIS ID of AL0001058056?
Columns: ['CERCLIS ID', 'Name', 'County', 'Proposed', 'Listed', 'Construction completed', 'Partially deleted', 'Deleted']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['AL6210020008', 'Alabama Army Ammunition Plant', 'Talladega', '10/15/1984', '07/22/1987', '–', '–', '–']
SQL:

assistant: SELECT "Proposed" FROM "Table" WHERE "CERCLIS ID" = 'AL0001058056';