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: Guatemala via Pan American Air Poster Tourism Vintage Travel Historic
Product description: Guatemala via Pan American
Product feature: Guatemala via Pan American, Poster Size: 17 inches by 11 inches, Rare Historic Poster, Archival Quality Reproduction
Product brand: Historic Poster
Target attributes: Type
Answer: attribute: type
value: poster
source: product brand
attribute: type
value: poster
source: product feature
attribute: type
value: poster
source: product title