Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: PIONEER BDRW INTERNAL BLURAY RW 12X - BDR-205
Product description: Pioneer BDR-205 12X Blu-ray Burner Black/Bulk Package (World's Fastest Blu-ray Writer)
Product feature: *Software bundle includes:Cyberlink software suite, *PowerDVD 8.0, *Power Director 7.0, *Power2GO 6.0
Product brand: Pioneer
Target attributes: Format
Answer: attribute: format
value: bluray
source: product title
attribute: format
value: blu-ray
source: product description
attribute: format
value: bdr
source: product title
attribute: format
value: bdrw
source: product title