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: Belkin Nostromo Touchsence Game Mouse Scroll Wheel (USB)
Product description: TouchSense technology from Immersion lets your n30 GameMouse transform digital information into physical sensations. In a game, it gives you realistic responses as you play. Feel gun blasts, your motorcycle's impact on hitting the ground, or your car hitting a wall. It adds something extra to your desktop, creating multiple vibrating sensations as you navigate desktop levels and menus, documents and web pages.
Product feature: Battle Wing provides enhanced grip and movement efficiency like no other mouse, Especially designed as a precision gaming tool that will help and enhance gamer's performance, Touch Sense technology from Immersion, Immersion Desktop software lets you feel sensations like pops, impulses, and textures when you move your cursor around your desktop, Compatible with Windows 98, 2000, Me systems with USB capability
Product brand: Belkin
Target attributes: Number of Buttons
Answer: attribute: number of buttons
value: None
source: None