Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: BARDSTOWN COUNTER. HT. CHAIR SET OF 2
Product feature: Table Sold Separately (Not Included); Counter Height Chair (2752S-24) - 1 box (pack of 2), Materials: Wood Veneers & Solids, Vinyl; Color: Dark Brown (Finish), Espresso (Upholstery), Dimensions: 19.5"L x 21.3"W x 41"H, Weight: 44.1 lb., Features: Transitional Style; Contoured Backs; Espresso Vinyl Cushions
Product price: $21.30
Product brand: Crown Mark
Target attributes: Upholstery Material
Answer: attribute: upholstery material
value: None
source: None