Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Tview T144DVFD-GR Car flip down DVD Monitor (Grey)
Product description: 14.1" Flip Down with Built in DVD player, Grey color
Product feature: Built in DVD player Compatible with DVD/VCD/MP3/CD-CD-RW, 4:3 High Resolution 1028xRGBx768, Built in IR FM Modulator, USB, SD Input & Built in IR Transmitter so you can connect with any wireless headphones, 1 Video Input & 1 Video Output, 1 Audio Input & Output, System NTSC / PAL, Built in Dual Dome Lights and comes along with a wireless full functional remote control, Multi Language OSD Menu & Crystal Clear picture using LED Panels, can be viewed from 90 degree angle
Product price: $8.71
Product brand: T-View
Target attributes: Screen Size
Answer: attribute: screen size
value: 14.1"
source: product description