Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Fujinon Mariner 7x50 WPC-XL Porro Prism Binocular
Product description: Fujinon Mariner XL 7x50 cut both weight and cost without cutting corners. Theyre 100% waterproof with bright fully-coated Fujinon optics and extra-long (18mm) eye relief. The compass and reticle display are clearly visible through the left eyepiece. For use after dark, an energy-saving LED nightlight is built in. The control pushbutton and battery are located in the right tube. This exclusive new design not only makes it easy to use the Fujinon-Mariner XL compass at night, it also reduces the chance of electrical interference affecting compass accuracy. For added protection, should your Fujinon-Mariner XL ever go overboard, its closed-cell foam flotation neck strap* will keep it safely afloat for easy recovery. For added protection, should your Fujinon-Mariner XL ever go overboard, its closed-cell foam flotation neck strap* will keep it safely afloat for easy recovery. Neckstrap, objective lens caps and dual eyepiece cap are standard accessories. Fujinon-Mariner XL series binoculars are backed with Fujifilms 5-year limited warranty (accessories, caps or rubber is not covered under warranty).
Product feature: Floats when used with provided strap., World Compass, Individual Focus, Porro Prosm Optical Design, Waterproof
Product price: $30.53
Product brand: Fujifilm
Target attributes: Prism Design
Answer: attribute: prism design
value: porro prism
source: product title
attribute: prism design
value: porro
source: product feature