question: What are the four shielded wires in the USB 2.0 variant used for ?
answer: two for power ( VBUS and GND ) , and two for differential data signals
turker_answer: Two of the four shielded wires in the USB 2.0 variant are used for power ( VBUS and GND ) , and two are used for differential data signals .
rule-based: The four shielded wires in the USB 2.0 variant are used for two for power ( VBUS and GND ) , and two for differential data signals .