question:  What is a cybrain?
context: The cool cybrain surgically implanted in him was working on the problem. The humming paragrav-paks embedded beneath his shoulder blades held him motionless above Newyork's three administrative towers. They don't teach them about their own city, that they'll be fighting for. Old cybrain, a gift from the Trooper surgeons, compliments of the city, would have to figure out which one. Two black paragrav-boats whirred along the translucent underside of Newyork's anti-missile force-shield, the Shell. Old cybrain better be fast. The cybrain jolted an impulse through his spine. Cybrain had taken charge of his motor nerves. A predatory excitement rippled through him as he sailed down through the air. A little red-white-and-green flag fluttered on a staff below the window. Cybrain knew what it was doing. "Lashing police with his vibray," said the announcer, "Lane broke through the cordon surrounding Manhattan Armory. Tammany Hall has warned that this man is extremely dangerous. A built-in electronic brain controls his reflexes—" "At ease with that jazz," said Lane, and a sheathed finger snapped out. The two police boats were hovering above the towers. Lane's mailed hand snapped open a pouch at his belt. The force-bomb "exploded"—swelled or inflated, really, but with the speed of a blast. A section of the energy globe bellied out from above. It shaded the view from his window and re-entered the tower wall just below. He gave the blonde girl a light dose of the vibray to slap her awake. Orange or green is the action. I am a diplomat of the Grassroots Republic of Mars. This is an embassy, if you know what that means." "Force-screen. From Mars. Sure, I've heard of it—you gotta go by spaceship. He takes orders from Newyork." Gerri Kin said, "That's what the force-domes did. But also the road to the return to city-states. Anarchy."
output:  A cybrain is a cybernetic brain. Cybrains are implanted in soldiers to make them the ultimate weapons.
options:  A cybrain is a cybernetic brain. The cybrain is in control of the Newyork Special Troops, like a hive mind.  A cybrain is a dispatch system that sends the Newyork Special Troops on their assignments.  A cybrain is a cybernetic brain. Cybrains are implanted in soldiers to make them the ultimate weapons.  A cybrain is an AI handler. Each of the Newyork Specail Troops has a cybrain which is their only contact to the command center.