Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Samsung SGH T459 Gravity Quad-Band Cell phone - T-Mobile
Product description: A great choice for heavy texters, the Samsung Gravity T459 features a slide-out QWERTY keyboard that makes it easy to send SMS text messages and email as well as keep up with your chat buddies on popular IM services. When coupled with web surfing capabilities, the Gravity allows users to stay up to date on the latest news, weather, sports scores and more. It will also keep you connected to your closest friends and family members with T-Mobiles myFaves. Other features include a 1.3-megapixel camera/camcorder, Bluetooth connectivity for both handsfree devices and stereo music streaming, MicroSD memory expansion up to 4 GB, digital audio player, and up to 6 hours of talk time. Samsung T459 Gravity - Aqua White Length 114.3 Width 53.3 Height 17.8 Color Aqua White Type GSM Dimensions 114.3 x 53.3 x 17.8 mm Unit Weight 121.9 g Form Factor Slide Network Band Quad Band 2G Frequency 1800 Mhz, 1900 Mhz, 850 Mhz, 900 Mhz Frequency Notes GSM 850 / 900 / 1800 / 1900 Compatible Networks O2, Orange, T-Mobile UK Data Network EDGE, GPRS Connectivity Bluetooth, Mini USB Display Size 176 x 220 pixels, 2.1 inches Display Type TFT, 256K colors Display Misc - QWERTY keyboard Camera Mega Pixel 1.3 MP, 1280 x 1024 pixels Camera Flash No Camera Auto Focus No Video Recording Yes Internal Memory No External Memory No Card Slot MicroSD Stanby Time Up to 300 h Talk Time Up to 6 h Unique Aspects 1.3-megapixel camera with video capture. Unique Aspects Video player compatible with MPEG4, H.263 formats. Unique Aspects Java (J2ME) support for downloadable games and applications Condition: New
Product price: $17.00
Product brand: Samsung
Target attributes: SIM Slots
Answer: attribute: sim slots
value: None
source: None