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: Justus Sheffield (Baseball Card) 2014 Bowman Sterling - Prospect Autographs #BSPA-JS
Product description: 2014 Bowman Sterling - Prospect Autographs #BSPA-JS - Justus Sheffield
Product feature: Sport: Baseball, Great for any Justus Sheffield fan, This is a collectible trading card.
Product brand: Bowman Sterling
Target attributes: Sport
Answer: attribute: sport
value: sheffield
source: product feature
attribute: sport
value: baseball
source: product title
attribute: sport
value: baseball
source: product feature
attribute: sport
value: sheffield
source: product description