Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Family name | Receptor | Coreceptor | Property | Chromosomal location |
| --- | --- | --- | --- | --- | --- |
| IL-1α | IL-1F1 | IL-1RI | IL-1RacP | Proinflammatory | 2q14 |
| IL-1β | IL-1F2 | IL-1RI | IL-1RacP | Proinflammatory | 2q14 |
| IL-1Ra | IL-1F3 | IL-1RI | NA | Antagonist for IL-1α, IL-1β | 2q14.2 |
| IL-18 | IL-1F4 | IL-18Rα | IL-18Rβ | Proinflammatory | 11q22.2-q22.3 |
| IL-36Ra | IL-1F5 | IL-1Rrp2 | NA | Antagonist for IL-36α, IL-36β, IL-36γ | 2q14 |
| IL-36α | IL-1F6 | IL-1Rrp2 | IL-1RAcP | Proinflammatory | 2q12 - q14.1 |
| IL-37 | IL-1F7 | Unknown | Unknown | Anti-inflammatory | 2q12 – q14.1 |
| IL-36β | IL-1F8 | IL-1Rrp2 | IL-1RAcP | Proinflammatory | 2q14 |
| IL-36γ | IL1-F9 | IL-1Rrp2 | IL-1RAcP | Proinflammatory | 2q12 – q21 |
| IL-38 | IL-1F10 | Unknown | Unknown | Unknown | 2q13 |
Question:
Which chromosomes have an unknown property?
Answer:
IL-38