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: Ultimate Support Ultimate Medium Keyboard Bench (JSMB100)
Product description: Medium Keyboard Bench Stay comfortable during long gigs in the studio or on stage with the JS-MB100 Medium Keyboard Bench. This bench features a large, thick (2") padded seat that helps to prevent fatigue. The sturdy X-style frame boasts a dual-locking clutch system and safely supports up to 200 lbs. You can adjust the JS-MB100 Medium Keyboard Bench to any of the eight eights and it folds flat for easy storage and transport.
Product feature: JS-MB100 Medium Keyboard Bench Features: Robust X-style steel frame, Large, thick (2") padded seat16 Possible Height Configurations (4 positions on each side), Dual-locking secure clutch system Folds flat for easy storage and transport
Product price: $39.99
Product brand: Ultimate Support
Target attributes: Type
Answer: attribute: type
value: keyboard bench
source: product description
attribute: type
value: keyboard bench
source: product title
attribute: type
value: keyboard bench
source: product feature