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: Seagate ST3146855SS 146Gb 15K Sas
Product description: 146GB 15K SAS 3.5" HARD DRIVE,
Product feature: Seagate, ST3146855SS, SAS (Serial Attached SCSI), 15000 RPM, 146GB
Product price: $14.99
Product brand: Seagate
Target attributes: Form Factor
Answer: attribute: form factor
value: 3.5"
source: product description