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: 14" White Bling Bling Star leather dog collar
Product description: Beautiful padded star leather dog collars with matching leashes and harnesses. These beautiful dog collars are double lined with leather. Outstanding quality and price! (available in sizes 10"-20" inch with matching leather dog leashes)
Product feature: 14" inch x 1/2" white star dog collar - Fits neck sizes "9-12.5" - dog collars (leather), White dog collar-Padded Star Bling Bling - leather dog collar, Double lined for durability and style - leather dog collar, Soft and flexible padded leather dog collar, Ourstanding quality and price leather dog collars!
Product brand: Pet Jewelry
Target attributes: Collar Type
Answer: attribute: collar type
value: None
source: None