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| What | Polio Vaccine | What | Parking Meter | |
| Who | Jonas E. Salk | Who | Carleton Magee | |
| Where | United States | Where | United States | |
| When | 1955 | When | 1932 | |
| Why | The polio vaccine was important because it prevents people from getting polio. | Why | The parking meter is important because the money goes to the city to pay for things. | |
| Researcher | Researcher | Kevin | ||