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: AT&T Partner MLS-12
Product description: Avaya Lucent AT&T Partner MLS 12 business phone is a speakerphone with 10 programmable buttons. The MLS-12 phone has conference, transfer, and hold buttons.
Product feature: The AT&T MLS 12 Partner phone has ten programmable line/feature buttons and fixed feature buttons (conference, speaker, microphone, transfer, and hold), AT&T - Avaya - Lucent - Partner, Fixed buttons: Feature, Conference, Transfer, Hold, Must be used on a Partner Plus, Partner II, or Partner ACS phone system
Product price: $4.71
Product brand: Avaya
Target attributes: Type
Answer: attribute: type
value: None
source: None