| <table border="1" class="dataframe"> | |
| <thead> | |
| <tr style="text-align: right;"> | |
| <th>Number of roofs</th> | |
| <th>Number of parakeets</th> | |
| </tr> | |
| </thead> | |
| <tbody> | |
| <tr> | |
| <td>1</td> | |
| <td>10</td> | |
| </tr> | |
| <tr> | |
| <td>2</td> | |
| <td>20</td> | |
| </tr> | |
| <tr> | |
| <td>3</td> | |
| <td>30</td> | |
| </tr> | |
| <tr> | |
| <td>4</td> | |
| <td>?</td> | |
| </tr> | |
| </tbody> | |
| </table> |