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: Surround Air CLA4 Sonic Aire Humidifier and Air Purifier
Product description: Ideal room size is 50 sq. ft.. 2-gallon tank allows up to 30 hours of operation. Portable ultrasonic and cool-mist humidifier. Operates on 5 fluid ounces of water for 180 minutes. Low water alarm and automatic shut-off.
Product feature: Ideal room size is 50 sq. ft., 2-gallon tank allows up to 30 hours of operation, Portable ultrasonic and cool-mist humidifier, Operates on 5 fluid ounces of water for 180 minutes, Low water alarm and automatic shut-off
Product price: $3.85
Product brand: Surround Air
Target attributes: Filter Type
Answer: attribute: filter type
value: None
source: None