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: Gigabyte LGA1151 Intel Z170 ATX Motherboard ATX DDR4 NA Motherboards (GA-Z170X-GAMING 5)
Product description: Supports 6th Generation Intel Core Processors Support for DDR4 All Digital Power Design with IR Digital PWM & IR PowIR stage ICs Dual M.2 Technology for SSD Drive Realtek ALC1150 HD audio with built-in Rear Audio Amplifier Independent Right and Left Audio Channel PCB Layers High end Nichicon audio capacitors LED lighting for the audio guard light path "Gain Boost Cover Audio Noise Guard Gold Plated Jacks SATA Express support for up to 16 Gb/s data transfer GIGABYTE UEFI Dual BIOS with Q-Flash Plus USB port Long lifespan Durable Black Solid cap Sapp Center including Easy Tune and Cloud Station utilities Thunderbolt Ready Safer design around screw mounting holes ATX Form Factor; 30.5cm x 24.4cm
Product feature: LGA1151, Supports 6th Generation Intel Core Processors, Memory socket: 4 x DDR4 DIMM sockets, Expansion Slots: 1x PCI-Express 3.0 x16 Slot, 1x PCI-Express 3.0 x8 Slot, 1x PCI-Express 3.0 x4 Slot, 4x PCI-Express 3.0 x1 Slots, Support for 2-Way NVIDIA SLI technology, 3-Way AMD Crossfire, 3 x SATA Express connector, 6 x SATA 6Gb/s connectors, ATX Form Factor; 30.5cm x 24.4cm, NOTE: Check User Manual on Technical Specification before use
Product brand: Gigabyte
Target attributes: Form Factor
Answer: attribute: form factor
value: atx
source: product title
attribute: form factor
value: atx
source: product description
attribute: form factor
value: atx
source: product feature