Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Hard & Heavy Cricket Tennis Balls By Vicky Supreme (Pack of 6)
Product description: Perfectly round shaped with standard weight.
Product feature: Hard & Heavy Cricket Tennis Balls, Weighs aproximately 120 grams ( + or - 5 Grams), Solid inner core.
Product brand: Vicky
Target attributes: High Grade
Answer: attribute: high grade
value: None
source: None