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: Jack Wolfskin Perfect Day Rucksack, black
Product description: Backpack: Application: Leisure Build: rear padding Version / Back length: normal Volume: Large Category: 15 - 30 l Backpack Volume: 22 l Material: Backpack: 100% polyester Weight: Backpack: 500 g Size: Backpack: 44 x 32/28 x 18 cm Additional Information: Main compartment with continuous zip large front compartment 2 mesh side pockets key carabiner small compartments and slots for small parts in front pocket
Product feature: Polyester, Pockets: 1 interior slip, 2 interior zip, 3 exterior
Product price: $31.43 - $90.75
Product brand: Jack Wolfskin
Target attributes: Material
Answer: attribute: material
value: None
source: None