Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Concordia Salsa Board Game
Product description: Concordia Salsa adds several new elements to the highly acclaimed, Concordia, strategy game. The new resource, Salt, produced in salt cities is a while card resource and thus, becomes desirable to acquire. 27 Forum cards introduce a new set up options and opportunities with permanent and one-time bonus abilities. 2 new maps provide different logistical challenges. Compatible with Britannia expansion.
Product feature: Expansion game, Requires Concordia to play, Compatible with Britannia expansion, 27 Forum cards and 2 new maps
Product price: $28.95
Product brand: Rio Grande Games
Target attributes: Age Group
Answer: attribute: age group
value: None
source: None