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: Sakura 1mm Pen Touch Fine Point Markers, Gold and Silver Metallic
Product description: These fine point markers are metallic, opaque and permanent. They are waterproof, fade resistant, and suitable for acid free environments. They can be use for invitations, greeting cards, craft projects, signs, scrapbooks, metal, wood, plastic, glass, and leather. Available in gold metallic and silver metallic color. Measures 1-mm size.
Product feature: These pen-touch markers are metallic, opaque and permanent markers, Waterproof fade resistant and suitable for acid free environments, They can be use for invitations, greeting cards, craft projects, signs, scrapbooks, metal, wood, plastic, glass, and leather, Available in gold metallic and silver metallic color, Includes 2 markers per pack; measures 1-mm size
Product brand: Sakura
Target attributes: Type
Answer: attribute: type
value: markers
source: product description
attribute: type
value: markers
source: product feature
attribute: type
value: markers
source: product title