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: Designer Steel Antennas - Universal - Black USA Flag, 18" Length.
Product description: Brand new item ships directly from our warehosue. Contact seller for more information about this product.
Product feature: Brand New, Comes with manufacturer warranty, International shipping available, Fits various makes and models, Carefully check vehicle fitment before purchase
Product brand: Tennatoys
Target attributes: Gain
Answer: attribute: gain
value: None
source: None