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: SKILCRAFT Liquid Magnus Rollerball Pens
Product description: Permanent, water and fade resistant acid-free liquid pigmented ink writes smoothly every time. Window in barrel makes it easy to monitor ink supply levels. Includes cap.
Product feature: Barrel_Color(s) - Clear, Cap_Color(s) - Black, Product_Type - Pens-Roller Ball, Ink_Color(s) - Black, Pen_Style - Stick
Product price: $27.05
Product brand: Skilcraft
Target attributes: Type
Answer: attribute: type
value: rollerball
source: product title
attribute: type
value: roller ball
source: product feature