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: 5230-BH-CLEAR Paris Flea Market 1LT Semi-Flush, Blush Finish with Clear Murano Glass Beads and Lead Crystal Glass
Product description: Crystorama 5230-BH-CLEAR Paris Flea Market 1LT Semi-Flush will add timeless charm to any home. A soft Blush finish complements the glitter of Clear Murano Glass Beads in a rich, vintage design that will become a welcoming addition to any decor. Place anywhere in your home for charm that will be appreciated for many years to come. Murano glass is glass made on the Venetian island of Murano, which has specialized in fancy glasswares for centuries. The 5230-BH-CLEAR is 6.5IN in diameter x 8IN tall. The 5230-BH-CLEAR comes one per package, and requires one (1) 60W medium base incandescent lamp (not included), dimmable using a standard incandescent dimmer. Crystorama was founded in Brooklyn, New York in 1958 by Abraham Kleinberg. The company was initially founded as a primary importer of crystal and brass chandeliers from Bohemia - Northern Czechoslovakia - offering the finest selection of classical designs. Throughout the last five decades, Crystorama has evolved into a dominant producer of interior decorative chandeliers. Crystorama has focused their efforts by taking their vast design experience and fusing it with current inspirations to produce fashion forward styles. Crystorama produces lighting collections for the traditionalist, minimalist and even the smallest customers. The lighting styles feature a mix of metals, finishes and crystals, and the inspirations are reflected in Crystorama's designs. Crystorama is proud to set the stage for decorative lighting yesterday, today and for tomorrow. Every Crystorama light has a story to tell. Create one with yours.
Product feature: 6.5IN in diameter x 8IN tall, Requires one (1) 60W medium base incandescent lamp, Blush finish with clear Murano glass beads, UL listed for dry, indoor locations
Product brand: Crystorama
Target attributes: Shade Material
Answer: attribute: shade material
value: glass
source: product feature
attribute: shade material
value: glass
source: product title
attribute: shade material
value: glass
source: product description