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: ViewSonic VA1906A-LED 19-Inches Widescreen LED Monitor - Black
Product description: VA1906a-LED is a 19" (18.5" Vis) widescreen LED monitor with Eco mode, 1366x768 resolution, 10M:1 DCR, VESA mountable design, automatic aspect ratio adjustment and 3 year warranty
Product feature: 19" (18.5" Vis) Widescreen LED, 10M:1 Dynamic Contrast Ratio, Automatic Aspect Ratio Adjustment, Eco Mode for reduced power consumption, VESA mountable 100mm x 100mm
Product brand: ViewSonic
Target attributes: Display Type
Answer: attribute: display type
value: led
source: product description
attribute: display type
value: led
source: product title
attribute: display type
value: led
source: product feature