Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Unlocked GSM Sony Ericsson T303C Music cell phone
Product description: Specification: GENERAL 2G Network , GSM 850 / 900 / 1800 / 1900 - T303C SIZE Dimensions : 83 x 47 x 14.7 mm Weight: 93 g DISPLAY Type: TFT, 65K colors Size 128 x 160 pixels, 1.8 inches- Wallpapers, screensavers SOUND Alert types: Vibration; Downloadable polyphonic, MP3 ringtones Speakerphone Yes MEMORY Phonebook: 500 entries,Photocall Call records 30 received, dialed and missed calls Internal : 8 MB Card slot: No DATA : GPRS Class 10 (4+1/3+2 slots),32 - 48 kbps EDGE : No 3G : No WLAN: No Bluetooth: Yes, v2.0 Infrared port : No USB: Yes (charging, mass storage) CAMERA Primary: 1.3 MP, 1280 x 1024 pixels FEATURES:Messaging SMS(250), MMS Browser: WAP 2.0/xHTML Radio: Stereo FM radio with RDS Games: Yes + downloadable Colors: Pink,Purple,Shimmering Silver, Shadow Black(Please tell us the color you want) Java: Yes,MIDP 2.0,TrackID music recognition,MP3 player,Voice memo,Organizer,Stopwatch BATTERY: Standard battery, Li-Po 930 mAh (BST-38)
Product feature: Calendar, Email Access, MP3 Player, Text Messaging, Java Enabled, MMS Enabled, Polyphonic Ringtones, Video Streaming, Speakerphone, USB Interface, Color Screen, Bluetooth Enabled
Product brand: Sony Ericsson
Target attributes: Operating System
Answer: attribute: operating system
value: None
source: None