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When was the first automobile built?
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Evolution
Which city has the most taxis?
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Evolution
How many taxi cab drivers are there in the United States?
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Evolution
Where was the first self-service gas station?
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Evolution
Who invented the traffic signal?
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Evolution
Who invented the first train?
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Evolution
What is the world’s busiest seaport?
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Evolution
What does a canal lock do?
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Evolution
