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: Tupperware Crisp It Lettuce Keeper with Aqua Seal
Product description: Keep your lettuce or cabbage crisp and flavorful in the 3 quart/2.8L capacity Tupperware Crisp it container with blueberry mist color seal.
Product feature: Keep lettuce or cabbage crisp and flavorful, 3 Quart/2.8L capacity, Container -natural clear, Seal-blueberry mist color
Product brand: Tupperware
Target attributes: Material
Answer: attribute: material
value: tupperware
source: product brand
attribute: material
value: tupperware
source: product description
attribute: material
value: tupperware
source: product title