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: Sony MDR-D777LP Altus Stereo Headphones (Discontinued by Manufacturer)
Product description: Sony Mdrd777Lp Portable Headphones
Product feature: Lightweight, Closed-Type Design, 40Mm Driver, Collapsible Design For Ultra Portability, Auro-Nomic Design For More Natural, Reproduction & Enhanced Wearing Comfort, Stereo headphones with aura-nomic design for increased comfort and elite sound, High-definition neodymium drivers produce 8 Hz to 80 kHz frequency response, Built-in ambient sound switch lets you hear outside noise while on the move, Aura-nomic design angles drivers parallel to ears for more natural listening, Foldable mechanism fits inside pouch; 3.94-foot cord; 1-year parts warranty
Product price: $3.76
Product brand: Sony
Target attributes: Style
Answer: attribute: style
value: None
source: None