Fill in the blank. A as two convolutional neural networks $($CNNs$)$ that battle each other. One CNN$,$ the generator, works towards creating output that is good enough to fool the other CNN$,$ called the discriminator.

natural language processing $($NLP$)$ system

generative adversarial network $($GAN$)$

vocal recognition network $($VRN$)$

heads up guidance system $($HGS$)$