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: Olatec 64GB Metal Key USB2.0 Flash Drive UDP USB Memory Stick (Silver)
Product description: Olatec P1045 New Arrival High Sales Metal Key Silver 64GB USB2.0 UDP Memory Stick *** Specifications: . Weight: 12g Available capacity: 64GB Compatibility: PC or Notebook with a USB interface Operation Systems: Windows Vista/XP/2000/ME/98/95, Mac OS 8.6 and above, Linux 2.4.X Drivers: Required only for Windows 98/95. Online Download Available Transfer Rate: High Speed USB 2.0. USB 1.1 Compatible. Operating current: <50mA Suspend current: <300uA Operating temp: -40 C (-40F) to +70 C (158F) Storage temp: -50 C (-58F) to +85 C (185F) Relative Humidity Under Operation: 1% to 98% Data retention: 10 Years Minimum EMI Compliance: FCC, CE,RoHS *** Disclaimer: . 1GB=1,000,000,000 bytes. Actual user storage less! Some of the listed capacity on a Flash storage device is used for formatting and other functions and thus is not available for data storage. The actual available capacity for data storage is less than what is listed on the products. . Speed may vary due to host hardware, software and usage.
Product feature: Data transfer speed: 12~18MB/s for read,3~6MB/s for write, Longevity life time and durable to use, Five Colors for OPTIONS: Black, Red, Blue, Gold, Silver, Metal key shaped, make it portable and easy to carry, 100% H2 test compliant
Product brand: olatec
Target attributes: Capacity
Answer: attribute: capacity
value: 64gb
source: product description
attribute: capacity
value: 64gb
source: product title