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: Konig & Meyer Laptop Holder for Certain Keyboards Models 18950,18810, 18953
Product description: This newly designed holder for the keyboard tables. Fits K&M 18810, 18950 and 18953. Provides a good view of your laptop. You will not find a more versatile laptop holder. There are 8 different tilt positions for the laptop support. In addition the holder can be attached to any of the legs of a keyboard stand. The adjustable stop pins mean the laptop connections are always accessible. The support shelf is also suitable for small items of equipment, e.g. an iPad.
Product feature: Fantastic quality laptop holder, Designed to fit k&m 18810,18950 and 18953, Very versatile, The desk top as 8 different tilt position, Can be attached to any part of the keyboard stand
Product price: $174.99
Product brand: KONIG & MEYER (K&M)
Target attributes: Max Weight Capacity
Answer: attribute: max weight capacity
value: None
source: None