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: Betsy & Adam Women's High-Neck Illusion Gown
Product description: Long jersey mock neck illusion waist is stunning and sexy.
Product feature: Self: 95% Polyester/5% Spandex, Combo: 79% Nylon/21% Spandex, Lining: 100% Polyester, Made in the USA and Imported, Dry Clean Only, High-neck full-length gown featuring illusion panels at bodice, Slight high/low hemline, Concealed back zipper, Package Dimensions: 1 x 1 x 1 inches, Shipping Weight: 1 pounds ( View shipping rates and policies ), ASIN: B011F02O84, Item model number: A16849, Date first listed on Amazon: September 18, 2015, Average Customer Review: 4.6 out of 5 stars 6 customer reviews
Product price: $189.00
Product brand: Betsy & Adam
Target attributes: Length
Answer: attribute: length
value: gown
source: product title
attribute: length
value: full-length
source: product feature
attribute: length
value: gown
source: product feature