Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: LG 100C Cell Phone (NET10)
Product description: Keep in touch with friends and family with this LG 100C mobile phone that features up to 2.5 hours talk time and text messaging. Vibration mode notifies you discreetly of incoming phone calls and messages.
Product feature: Airtime balance display Lets you know how many minutes and days of service you have remaining on your phone., Text messaging Lets you communicate by typing., Operates on CDMA wireless network For reliable wireless communication., Color display Makes navigation of features a breeze., Polyphonic ringtones Allow you to personalize the sound of your phone., Vibration mode Notifies you discreetly of incoming phone calls and messages., Voice activation For hands-free dialing., Speed dial Lets you call frequently used numbers with the touch of a button., 1000-entry phone book Keeps your contact numbers where you need them., Hands-free speakerphone Allows you to keep your hands on the wheel while driving., Organizational tools Include a scheduler, alarm, calculator, timer, stopwatch and world clock to add more useful functionality to your phone., Downloadable content Includes graphics and games to add creative touches to your phone., Up to 2.5 hours talk time and up to 10 days standby On one battery charge.
Product price: $45.00
Product brand: NET10
Target attributes: Screen Size
Answer: attribute: screen size
value: None
source: None