Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Buyartforless Black Great Dane Brewing Co San Francisco by Ryan Fowler 14x11 Great Dane Beer Signs Dogs Animals Art Print Poster Vintage Advertising Sign Gentle Giant
Product description: Black Great Dane Brewing Co San Francisco by Ryan Fowler 14x11 Great Dane Beer Signs Dogs Animals Art Print Poster Vintage Advertising Sign Gentle Giant
Product feature: Printed on heavy stock paper, Packed to arrive in perfect condition, Paper Size: 14x11, Image Size: 14x11, Made in the U.S.A.
Product price: $13.31
Product brand: Buyartforless
Target attributes: Paint Medium
Answer: attribute: paint medium
value: None
source: None