Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Kodak Z7590 Digital Camera Memory Card 2GB Standard Secure Digital (SD) Memory Card
Product description: 2GB Standard Secure Digital (SD) Memory Card
Product feature: 2GB Standard Secure Digital (SD) Memory Card
Product price: $13.99
Product brand: Transcend
Target attributes: Format
Answer: attribute: format
value: sd
source: product feature
attribute: format
value: sd
source: product description
attribute: format
value: sd
source: product title