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: Apple iPhone 6S Plus, Sprint Locked, Space Gray
Product description: WITH 3D TOUCH, LIVE PHOTOS, 7000 SERIES ALUMINUM, A9 CHIP, ADVANCED CAMERAS, 5.5-INCH RETINA HD DISPLAY, AND SO MUCH MORE, YOU'LL SEE HOW WITH IPHONE 6S PLUS THE ONLY THING THAT'S CHANGED IS EVERYTHING
Product feature: 5.5-inch LED-backlit IPS LCD Capacitive Touchscreen, 1080 x 1920 pixel resolution (~401ppi pixel density) + Ion-strengthened glass, Olephobic Coating, Chipset: Apple A9, Processor: Dual-Core 1.84 GHz Twister, GPU: PowerVR GT7600 (Six-Core Graphics), 13 Megapixel Camera with f/2.2, 29mm, phase detection autofocus, OIS, dual-LED (dual tone) flash, 1/3" sensor size, 1.22 m pixel size, geo-tagging, simultaneous 4K video and 8MP image recording, touch focus, face/smile detection, HDR (photo/panorama), 2GB RAM WLAN: Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot; Bluetooth: v4.2, A2DP, LE; GPS: Yes, with A-GPS, GLONASS; NFC: Yes, Apple Pay Only; USB: microUSB v2.0, Reversible Connector, Non-Removable Lithium Polymer 2750 mAh Battery - Standby: Up to 384h (3G), Talk Time: Up to 24h
Product brand: Apple
Target attributes: Front Camera Resolution
Answer: attribute: front camera resolution
value: None
source: None