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: LG 55LB6500 55-Inch Full HD TV
Product description: LG SMART TV, POWERED BYweb OS
Product feature: 100HZ SCREEN REFRESH RATE, MAGIC REMOTE, CINEMA 3D
Product brand: LG
Target attributes: Viewing Angle
Answer: attribute: viewing angle
value: None
source: None