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: Drum Lamp Shade, 18" LINEN, NATURAL
Product description: Beautifully made, our Drum Shade has an iconic drum shape for a contemporary feel. The clean, simple lines of these table lamp shades work well with practically any style lamp. Our drum shade is available in a variety of colors and textures to make creating your "new" lamp fun, quick and easy! Drum-style lamp shade. Use with spider/harp fitter. Available in a variety of designs. Actual size is 18" LINEN
Product feature: Choose 10"H x 14" diameter, 11"H x 16" diameter or 12"H x 18" diameter., Natural, Our No Hassle Return policy gives you peace of mind to enjoy the purchase in your home for up to 45 days., Free Shipping on All Lighting
Product price: $2.85
Product brand: Home Decorators Collection
Target attributes: Shape
Answer: attribute: shape
value: drum
source: product title
attribute: shape
value: drum
source: product description