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: Samsung Galaxy SII 4G T-Mobile T989 Black (not unlocked)
Product feature: Blazing Fast Internet Access on T-Mobile's 4G Network, 4.5"" High-Resolution Super AMOLED Plus Touch-Screen, Qualcomm Snapdragon S3 Processor with 1.5 GHz Dual-Core CPUs, 16GB Memory; Expandable to 48GB, HD Camcorder (1080p)
Product brand: Samsung
Target attributes: Form Factor
Answer: attribute: form factor
value: None
source: None