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: Poulan Pro PR625N21RH3-CA 21-Inch Briggs and Stratton 625 Series Gas Powered 3-in-1 Push Lawn Mower With High Rear Wheels
Product description: California Compliant - Poulan Pro mowers provide the latest and greatest features at industry leading prices. "Nothing cuts like a Pro." The 21-Inch 3 in 1 Poulan Pro push mower (PO625N21RH) features a 625 series Briggs and Stratton engine, is mulch, side discharge and bag ready, 5 position height adjusters that adjust the cutting height easily and without tools, 7-Inch front wheels, 12-Inch high rear wheels making mowing easier when conditions are hilly or rough. Easy to turn and easy to maneuver. This mower comes assembled.
Product feature: 625 Series Briggs and Stratton, Push walk behind mower, 21-Inch deck, Mulch, bag and side discharge, CARB Compliant
Product brand: Poulan
Target attributes: Drive Type
Answer: attribute: drive type
value: None
source: None