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: Samsung Galaxy S6 G920I - Factory Unlocked Phone - Retail Packaging (Gold Platinum)
Product description: The Samsung Galaxy S 6 is powerful to use and beautiful to behold. The slim and lightweight all-metal body and glass design make a bold statement, while the lightning-fast Samsung Exynos 7420 Octa-core 64-bit processor delivers the most power and speed weve ever put in a smartphone.
Product feature: Reimagined Design Inside and Out, 5.1" Quad HD Super AMOLED display, 16MP rear-facing camera
Product price: $339.99
Product brand: Samsung
Target attributes: Operating System
Answer: attribute: operating system
value: None
source: None