<|im_start|>user
Which one of these are unlike the others: Toyota Supra, Mitsubishi 3000GT, Mazda RX-7, Nissan 300ZX?<|im_end|>
<|im_start|>assistant
All of these are iconic 90s Japanese sports cars, but the RX-7 is unique in that it has a rotary engine, as opposed to the piston engines of the other cars.<|im_end|>
