user: ### NOW ANSWER:
Question: What stain is used commonly for Elastic fibers?
Columns: ['Stain', 'Common use', 'Nucleus', 'Cytoplasm', 'Red blood cell (RBC)', 'Collagen fibers', 'Specifically stains']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Haematoxylin', 'General staining when paired with eosin (i.e. H&E)', 'Orange, Cyan Blue or Green', 'Blue/Brown/Black', 'N/A', 'N/A', 'Nucleic acids—blue ER (endoplasmic reticulum)—blue']
SQL:

assistant: SELECT "Stain" FROM "Table" WHERE "Common use" = 'Elastic fibers';