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: Columbia PFG Bahama Vent Slip-Ons
Product description: Going fishing This lightweight, drainable boat shoe is designed with great traction for deck or land. Canvas/leather upper, techlite midsole with superior cushioning, air flow and water drainable ports, and Omni-Grip non-marking wet grip outsole with razor traction. Imported.
Product feature: Leather, Made in USA or Imported, Synthetic sole, This lightweight, drainable boat shoe, Designed with great traction for deck or land, Techlite midsole with superior cushioning, Air flow and water drainable ports, Omni-Grip non-marking wet grip outsole with razor traction, Product Dimensions: 15 x 10 x 5 inches, Shipping Weight: 4 pounds ( View shipping rates and policies ), ASIN: B01CI2VQKK, Item model number: 1673141, Date first listed on Amazon: January 25, 2014, Average Customer Review: 4.5 out of 5 stars 124 customer reviews
Product price: $29.95 - $489.63
Target attributes: Type
Answer: attribute: type
value: shoe
source: product description
attribute: type
value: shoe
source: product feature