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: 1/2 in Hammer Drill (710w)
Product description: Excellent all-purpose corded drill. Will handle most regular jobs around the sho[p.
Product feature: Voltage: 110V/60Hz, Chuck Size: 1/2 in (13mm), Variable Speed: 0 2800 rpm, Impact Times: 0-38400/minl, Reversible with lock button, 6 ft cord
Product brand: American Power
Target attributes: Chuck Type
Answer: attribute: chuck type
value: None
source: None