Question: Where does a catalytic converter go on a car?
qaPairs: question: Where did the first catalytic converters go on cars?
answer: close to the engine
question: Where did catalytic converters go on cars after they were placed close to the engine?
answer: third of the way back from the engine
question: Where did catalytic converters go after they were placed a third of the way back from the engine?
answer: underneath the vehicle