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: Canon PowerShot ELPH 180 Digital Camera Memory Card 32GB Secure Digital (SDHC) Flash Memory Card
Product description: High-Speed 32GB SDHC Flash Card.
Product feature: 32GB Secure Digital (SDHC) Flash Memory Card
Product price: $13.49
Product brand: Transcend
Target attributes: Capacity
Answer: attribute: capacity
value: 32gb
source: product description
attribute: capacity
value: 32gb
source: product feature
attribute: capacity
value: 32gb
source: product title