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: Easton XL1 Maple Wood Baseball Bat
Product description: The XL1 Maple is an extra long barrel design built to play like the XL1 BBCOR bat. With hand-split professional grade maple for straighter grain, resulting in a harder, more durable, better performing bat.
Product feature: Hand-split professional grade maple for straighter grain, resulting in a hard, more durable, better performing bat, Laser engraved barrel with cupped end, Pro ink dot tested for grain straightness
Product brand: Easton
Target attributes: Barrel Size
Answer: attribute: barrel size
value: None
source: None