Task: Explanation
Input (English): The FV4030/4 Challenger 1 is a British main battle tank (MBT) used by the British Army from 1983 to the mid-1990s, when it was superseded by the Challenger 2. It is also currently used by the Royal Jordanian Army as its main battle tank after heavy modifications. The variants for the Jordanian military are to be upgraded using the unmanned Falcon turret. Question: What does the Challenger 2 have in common with the Challenger 1? Answer: British main battle tank
Output (English): The FV40304 Challenger 1 is a British main battle tank MBT used by the British Army from 1983 to the mid1990s, when it was superseded by the Challenger 2.