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: STERLING 402215-96 Windham 12-Inch Rough-in Elongated Toilet, Biscuit
Product description: Windham toilets are engineered to deliver exceptional performance and designed for functionality and style. Vitreous china construction and a water-saving flush means dependable performance with lasting value., Windham toilets are engineered to deliver exceptional performance and designed for functionality and style. Vitreous china construction and a water-saving flush means dependable performance with lasting value.
Product feature: Crafted of Grade A vitreous china to provide a durable, non-porous product with a hard, glossy finish, Uses only 1.6 gallons of water per flush; meets today's strict water conservation standards, Elongated bowl has an extended rim length for comfortable use by adults, Three-bolt quick-connect installation system, One flush performance limited guarantee
Product brand: STERLING, a KOHLER Company
Target attributes: Bowl Shape
Answer: attribute: bowl shape
value: elongated
source: product title
attribute: bowl shape
value: elongated
source: product feature