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: South Park 8.5 Inch 5 Pc Plush Set Included Eric, Kenny, Kyle, Stan, Butters
Product feature: South Park Plush Set Includes : Kenny, Eric, Kyle, Stan and Butters, 7-8.5Inch tall, 3+ age, Soft Plush
Product brand: South Park
Target attributes: Form
Answer: attribute: form
value: None
source: None