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| id | date_start | two_years_later_id | two_years_later_date |
|---|---|---|---|
| 1 | 2019-05-22 | 3 | 2021-05-22 |
| 2 | 2020-06-15 | null | null |
| 3 | 2021-05-22 | 4 | 2023-05-22 |
| 4 | 2023-05-22 | null | null |
| 5 | 2024-02-07 | null | null |