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: Libra 12" Mobile Home trailer brake shoes replacement kits (2 pairs) - 21031
Product description: Libra 12" Mobile Home trailer brake shoes replacement kits (2 pairs)
Product feature: New OE 12" x 2" Mobile Home trailer brake shoes with linings for replacement for one axle, works with Dexter Style mobile home brakes, Includes: 2 pairs of shoes for 2 brakes/1 axle
Product price: $52.90
Product brand: Libra
Target attributes: Wheel / Tire
Answer: attribute: wheel / tire
value: None
source: None