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: MCR Safety Multi Task Light Gloves - Medium
Product description: This new multi-task product is state-of-the-art and made with synthetic leather. World class sophisticated manufacturing incorporates curved finger construction to achieve an ergonomic fit for less fatigue. The most distinguishing feature, though, are the two high-intensity LED lights per pair. The knuckle side features four attachment points for pinpointed light assistance in dark or low-light environments. This LED bulb produces 12,000 MCD (millicandela) and has a life rating of 50,000 hours. Features synthetic palm with padding, adjustable wrist closure, and black PVC grip on palm and fingertips with black terrycloth thumb.
Product feature: Gloves have two attachedLED lights per pair, Synthetic leather with curved finger for less fatigue, LED bulb has a life rating of 50,000 hours, Adjustable wrist closure and black PVC grip on palm, Four attachment points for pinpointed light
Product brand: MCR Safety
Target attributes: Size
Answer: attribute: size
value: medium
source: product title