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: Frigidaire : FGC26C3AW 26 Open Burner Gas Cooktop - White
Product description: Frigidaire 26"" Open Gas Cooktop
Product feature: 26"" Spill Saver Porcelain / Chrome Cooktop, Drip Pans - Chrome, Electronic Pilotless Ignition, Lift-up Cooktop with Support Rod, Removable Control Knobs
Product brand: Frigidaire
Target attributes: Burner Type
Answer: attribute: burner type
value: gas
source: product title
attribute: burner type
value: gas
source: product description