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: Optical Quantum OQBDR04LT-50 4X 25 GB BD-R Single Layer Blu-Ray Recordable Logo Top 50-Disc Spindle
Product description: The Optical Quantum Blu-ray Disc series is on the cutting edge of technology using a blue-violet laser to record either high-definition (HD) video or high capacity gigabyte data files. Using Optical Quantum's exclusive FMS (Flexible Manufacturing System) and sophisticated production know-how brings next generation products like recordable Blu-ray discs to market in the shortest time frame with reasonable pricing. Viewers will especially enjoy High-Definition video programming using the Optical Quantum Blu-ray Disc series.
Product feature: Blu-ray discs are designed especially to store large HD video and audio files., All Optical Quantum Blu-ray discs are treated with a super hard coat to prevent scratches, resist fingerprints and reduce dust build-up, Blu-ray discs use blue-violet laser technology to read and write data., Compatible with LG 6x, 8x, 10x, 12x / Lite-on 8x, 12x / PIONEER BDR 202, 203, 205, 206, 206M, 207 (Pioneer 4x, 8x, 12x burners) / SONY 2x, 4x, 6x, 8x, 12x / PANASONIC 2x, 4x, 6x, 8x, 12x and all Blu-ray burners with BD-R burning speed 8x or above, This single-layer Blu-ray disc offers up to 25 GB of storage space to back-up your video, music, photos and more.
Product price: $24.97
Product brand: Optical Quantum
Target attributes: Media Type
Answer: attribute: media type
value: bdr
source: product feature
attribute: media type
value: blu-ray
source: product description
attribute: media type
value: bd-r
source: product title
attribute: media type
value: blu-ray
source: product title
attribute: media type
value: blu-ray
source: product feature