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: Outdoor Artificial Red Azalea 34" Hanging Vine
Product description: These 34" (height) outdoor UV rated artificial azaleas look great cascading over the edge of a window box, flower pot, hanging basket or large outdoor planter. These artificial azaleas look real from any distance and are a great solution for window boxes and planters that are in hard to reach locations. All artificial plants are shipped un-potted in vine form.
Product feature: Adds a lifelike boost to your exterior architecture and landscaping, Outdoor Artificial Flowers are shipped un-potted as a loose vine, Made of a high quality industrial grade polyethylene blend material with added ingredients to prevent U.V. degradation, Look real from any distance, 34" High x ~12-16" Wide
Product price: $49.97
Product brand: Windowbox
Target attributes: Stem Variety
Answer: attribute: stem variety
value: None
source: None