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: Alcatel ONETOUCH FIERCE Cell Phone Memory Card 8GB microSDHC Memory Card with SD Adapter
Product description: 8GB microSDHC Memory Card with SD Adapter
Product feature: 8GB microSDHC Memory Card with SD Adapter
Product price: $10.48
Product brand: Transcend
Target attributes: Capacity
Answer: attribute: capacity
value: 8gb
source: product description
attribute: capacity
value: 8gb
source: product title
attribute: capacity
value: 8gb
source: product feature