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:
| State | Type | Name | Title | Royal house | From |
| --- | --- | --- | --- | --- | --- |
| Cao | Sovereign | Zhong | Lord | — | 1002 BC |
| Lu | Sovereign | Bo Qin | Ruler | Ji | 1043 BC |
| Lu | Sovereign | Kao | Duke | Ji | 997 BC |
| Lu | Sovereign | Yang | Duke | Ji | 993 BC |
| Qi | Sovereign | Ding | Duke | — | 999 BC |
Question:
What type of state has a royal house of ji and has a ruler?
Answer:
Sovereign