Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Apple MacBook Pro 13.3-Inch Laptop Intel Core i5 2.3GHz / 8GB DDR3 Memory / 500GB SSHD (Solid State Hybrid) Drive / OS X 10.10 Yosemite / ThunderBolt / DVD Burner
Product description: Apple MacBook Pro 13.3-Inch Laptop Intel Core i5 2.3GHz / 8GB DDR3 Memory 500GB SSHD (Solid State Hybrid) Drive OS X 10.10 Yosemite / ThunderBolt / DVD Burner
Product feature: Apple MacBook Pro 13.3-Inch Laptop, Intel Core i5 2.3GHz / 8GB DDR3 Memory, 500GB SSHD (Solid State Hybrid) Drive, OS X 10.10 Yosemite / ThunderBolt / DVD Burner
Product brand: Apple Computer
Target attributes: Battery Life
Answer: attribute: battery life
value: None
source: None