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: Sitcom Vintage Commercial Grade Adjustable Height Bar Stool
Product description: The Vintage counter height dining collection features Distressed solid Asian oak, industrial patina steel base, swiveling bar height adjustment from 25" to 34" h and are fully assembled. The counter height table allows for comfortable seating for 4 people. Width 22.00. Assembly Required: Medium Assembly. Arms: No. Style: Vintage Material Wood. Dimensions 22"L x 22"W x 25.5"H. Color: Dark Oak.
Product feature: Frame wood, Type: Barstool, Length: 22.00, Height: 25.50
Product brand: Sitcom
Target attributes: Type
Answer: attribute: type
value: barstool
source: product feature
attribute: type
value: bar height
source: product description
attribute: type
value: counter height
source: product description
attribute: type
value: bar stool
source: product title