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: Carolina Hardware and Decor 1926 Talavera Eclipse Ceramic Cabinet Drawer Knobs, Set of 3
Product description: 1-1/2 inch ceramic cabinet, drawer, or furniture knob with mounting hardware included. Also works great in a bathroom or on bi-fold closet doors (may require longer screws). Items can be wiped clean with a soft damp cloth. Great addition and nice finishing touch to any room.
Product feature: Set of THREE - 1 1/2 inch white ceramic knobs, 1 inch mounting hardware included, Easy installation, Great as cabinet, drawer, or furniture knobs, Adds a nice finishing touch to any room
Product price: $10.92
Product brand: Carolina Hardware and Decor
Target attributes: Knob Shape
Answer: attribute: knob shape
value: None
source: None