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: Vivitar 356PZ Zoom Date 35mm Camera
Product feature: Compact 35mm zoom camera, 35-60mm zoom lens, Date imprinting, Programmed AE shutter for accurate, consistent exposures, Automatic flash with red-eye reduction
Product brand: Vivitar
Target attributes: Weight
Answer: attribute: weight
value: None
source: None