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: Dr. Martens Women's Emmeline Boot
Product description: Lace low boot
Product feature: Leather, Imported, Synthetic sole, Shaft measures approximately 5" from arch, Heel measures approximately 1 inches", 5-eye boot, Air-cushioned, synthetic sole, Slip resistant, Classic doc dna: goodyear-welted stitch, grooved sides, heel loopa simple, clean design with all the essential doc dna, the emmeline is tough, durable boot that's built to last., Product Dimensions: 5 x 5 x 0.7 inches, Shipping Weight: 12 ounces ( View shipping rates and policies ), ASIN: B074YSLQ5F, Date first listed on Amazon: August 20, 2017, Average Customer Review: 4.1 out of 5 stars 33 customer reviews
Product price: $85.54 - $135.43
Target attributes: Type
Answer: attribute: type
value: boot
source: product description
attribute: type
value: boot
source: product title
attribute: type
value: boot
source: product feature