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: Stubb's Steak Spice Rub, 2 ounce (Pack of 6)
Product description: Stubb's Steak Rub is a peppery blend of sea salt, garlic and ancho chile., 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: $36.75
Product brand: Stubb's
Target attributes: Form
Answer: attribute: form
value: rub
source: product title
attribute: form
value: rub
source: product description