::: {.cell hash='Lecture_cache/revealjs/unnamed-chunk-26_d8b1719ecef71c0f2523948477ecddb0'}

```{.r .cell-code}
table(are.still.present)
```

::: {.cell-output .cell-output-stdout}
```
are.still.present
FALSE  TRUE 
 1876  3703 
```
:::
:::