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 S II/S2 GT-i9100 GSM Factory Unlocked Phone - No Warranty (White)
Product description: Perfect Condition. This is an INTERNATIONAL version. Not operations in the US. Purchased in SAUDI ARABIA October 2012. Used occasionally for 1 month. Included: Manual, wall charger (Saudi Arabia), USB cable, Un-opened Ear Buds.
Product feature: International Version. Will not be operational in the US., Nearly Perfect Condition., NO Scartches., All accessories and manual included., For Saudi Arabia.
Product brand: Samsung
Target attributes: Weight
Answer: attribute: weight
value: None
source: None