Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Paragon Canola Popcorn Popping Oil (Gallon)
Product description: If you desire a healthy choice, canola is for you.
Product feature: One gallon.
Product price: $21.99
Product brand: Paragon - Manufactured Fun
Target attributes: Size
Answer: attribute: size
value: None
source: None