Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: New Asus Zenfone 6 32GB Dual SIM (Unlocked) A600CG 3G 6" Intel Z2580 2G RAM Black
Product feature: ASUS Zen UI, Dual SIM, 13MP, Micro sim
Product brand: ASUS
Target attributes: SIM Slots
Answer: attribute: sim slots
value: dual sim
source: product feature
attribute: sim slots
value: dual sim
source: product title