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: Centon Electronics Flash Memory Card (S1-SDXU1-128G)
Product description: Centon 128GB SDHC UHS-1. Using the latest in memory technologies and design, Centon brings quality, reliable storage products for you to enjoy and depend on.
Product feature: Memory for phone, tablets, and digital cameras/camcorders, R/W: 80/20, 5 Year Warranty, Clip this coupon to save 5% on this product when you buy from Amazon.com. Here's how (restrictions apply)
Product price: $4.99
Product brand: Centon
Target attributes: SD Format
Answer: attribute: sd format
value: sdhc
source: product description