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: Canon PowerShot ELPH 310 HS 12.1 MP CMOS Digital Camera with 8x Wide-Angle Optical Zoom Lens and Full 1080p HD Video (Black)
Product description: BRAND NEW in FACTORY SEALED box. With 1 year Nikon warranty. Couldn't sell under NEW category due to an amazon restriction. Will ship within 1 business day. Buy with confidence
Product feature: Ultra-slim camera with 28mm Wide-Angle lens, 8x Optical Zoom, and Optical Image Stabilizer, 12.1 Megapixel CMOS sensor combined with Canon's DIGIC 4, Capture stunning Full HD 1080p video in stereo sound with a dedicated movie button; High-Speed Burst Mode allows continuous shooting & Super Slow Motion Movie records video at high speeds to allow playback in slow motion, Smart AUTO Funciton Based on 32 Predefined Shooting Situations, Box Contents - ELPH 310 HS, Battery Pack NB-4L, Battery Charger CB-2LV, Wrist Strap, USB Cable, CD-ROM
Product price: $37.59
Product brand: Canon
Target attributes: Sensor Size
Answer: attribute: sensor size
value: None
source: None