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: Luxury Lane Hand Blown Multicolor Sommerso Teardrop Art Glass Vase 10" Tall
Product description: The hand-blown craftsmanship of the Sommerso technique gives this and all Sommerso vases a strikingly smooth look. The translucent nature of the vase allows light to pass through the outer layers of the glass, illuminating the colorful center. The detailed artistic process of glass blowing causes slight variations in each piece making no two pieces identical. Please note, because this item is handblown, it is not uncommon for air bubbles to be present.
Product feature: Approx dimensions: 10" tall x 5" wide, Weight: 3.52 lbs, Layered colors of blue, green, purple, 100% mouth-blown art glass, Polished flat bottom for secure standing, Clip this coupon to save $20.00 on this product when you buy from Amazon.com. Here's how (restrictions apply)
Product price: $55.00
Product brand: Luxury Lane
Target attributes: Material
Answer: attribute: material
value: glass
source: product title
attribute: material
value: glass
source: product feature
attribute: material
value: glass
source: product description