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: NFL San Diego Chargers 27/37-Inch Vertical Flag
Product description: Officially licensed flag. Designed to hang vertically from an outdoor pole or inside as wall decor. Durable polyester flag measures 27x 37-Inch with a 2.5-Inch pole sleeve. Machine washable. Poles and hardware available separately. Made in USA.
Product feature: Made in USA, Perfect for the No.1 fan, Washable, Indoor or outdoor use, Vibrant Colors
Product brand: WinCraft
Target attributes: Season
Answer: attribute: season
value: None
source: None