Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Sheffield Side Chair, LINEN SEAT, ANTIQUE BLUE
Product description: The gracefully curving, scalloped details of our Sheffield Side Chair include a vase back and cabriole legs. These casually elegant dining chairs are available in a variety of warm, antiqued finishes. A soft linen seat completes the vintage look. Wood in your choice of distressed finish. Linen seat. Actual size is LINEN SEAT
Product feature: 41"H x 20"W x 21.5"D., Assembly required.
Product brand: Home Decorators Collection
Target attributes: Upholstery Material
Answer: attribute: upholstery material
value: linen
source: product title
attribute: upholstery material
value: linen
source: product description