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: Want Want Big Shelly Senbei Natural Flavored Crispy Rice Cracker 150g (pack of 2)
Product description: Want Want Big Shelly Senbei Natural Flavored Crispy Rice Cracker 150g [sell by DragonMall] (pack of 2), Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
Product price: $16.99
Product brand: DragonMall
Target attributes: Variety
Answer: attribute: variety
value: rice
source: product title
attribute: variety
value: rice
source: product description