Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: BestKeys 2001 Mazda B4000 3 Button Replacement Keyless Entry Remote Key Fob
Product description: Save on a replacement 2001 Mazda B4000 Keyless Entry Remote. Don't waste money at the dealership. Buy this high quality replacement key fob and program it yourself at home for free!
Product feature: We will provide a link to our website with Free Do-It-Yourself programming instructions with your order., Remote requires 1 working key to program., Save up to 70% off dealership prices, Lock + Unlock + Panic, YOUR KEY SUPPLIER is the only authorized seller of BESTKEYS products. All warranties will be voided if bought from any other sellers.
Product brand: BestKeys
Target attributes: Type
Answer: attribute: type
value: key fob
source: product description
attribute: type
value: keyless entry
source: product title
attribute: type
value: keyless entry
source: product description