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: Skyway Tuff Wheel Mag Front Wheel 3/8 Nutted 16 x 1.75 Black
Product description: Skyways original Tuff wheel Built to accommodate pneumatic or non-pneumatic tires
Product feature: Skyway'S Original Tuff Wheel, Built To Accommodate Pneumatic Or Non-Pneumatic Tires
Product brand: Aitaton
Target attributes: Size
Answer: attribute: size
value: 16 x
source: product title