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| nest_level |
|---|
| 0 |
| callNumber | nest_level |
|---|---|
| Before 2 | 1 |
| callNumber | nest_level |
|---|---|
| Before 1 | 2 |
| callNumber | nest_level |
|---|---|
| Before 0 | 3 |
| callNumber | nest_level |
|---|---|
| After 0 | 3 |
| callNumber | nest_level |
|---|---|
| After 1 | 2 |
| callNumber | nest_level |
|---|---|
| After 2 | 1 |