Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Hello Kitty KT4098 Optical Mouse & Matching Mouse Pad W/USB to PS2 Adapter Electronics Computers Accessories
Product description: Hello Kitty Optical Mouse with Mouse Pad
Product feature: NEW, HELLO KITTY, WARRANTY : 1 Year Direct Manufacturer Warranty, MEGA-KT4098
Product price: $2.54
Product brand: Hello Kitty
Target attributes: Sensitivity
Answer: attribute: sensitivity
value: None
source: None