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: Kakato Nylon Pet Dog Cat Puppy Sling Single Shoulder Bag Carrier Holder Tote-Black Medium Size
Product description: Features Carried courier-style, small dogs love the opportunity to travel in the Sling while looking out. An adjustable padded shoulder strap which is also used as leading Leash and interior collar zipper makes this collapsible carrier with versatile styles for active pet owners. Vary Sizes,For dogs up to 14.5 lbs. Please refer to the measurement in details. Measurement S size L 23.5" *Bag bottom width 6.2" *Bag mouth width 14.5" * Bag mouth height 4.9". M size L 24.5" *Bag bottom width 7.2" *Bag mouth width 16.5" * Bag mouth height 5.5". L size L 25.5" *Bag bottom width 8.2" *Bag mouth width 17.7" * Bag mouth height 6.3". Package Includes: 1 x Sling *About Shipment* Our warehouse is located in China and all the parcels are shipped by China post e-Packet. Normally it takes 8~20 business days (except weekends) to arrive with tracking number, you can track it from the website of www.usps.com in detail.
Product feature: Safety zipper to secure them inside the sling, Adjustable shoulder strap, Perfect for the dog or cat, Durable and soft Nylon Material., Unique Stylish Art Pattern ,Eye-Catching
Product brand: Kakato
Target attributes: Type
Answer: attribute: type
value: sling
source: product feature
attribute: type
value: carrier
source: product description
attribute: type
value: sling
source: product description
attribute: type
value: carrier
source: product title
attribute: type
value: sling
source: product title