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:
| Type | Name | Title | Royal house | From |
| --- | --- | --- | --- | --- |
| Sovereign | Mentuhotep II | Pharaoh | Eleventh dynasty | 2010 BC |
| Sovereign | Mentuhotep IV | Pharaoh | Eleventh dynasty | 1998 BC or 1997 BC |
| Sovereign | Amenemhat I | Pharaoh | Twelfth dynasty | 1991 BC |
| Sovereign | Senusret I | Pharaoh | Twelfth dynasty | 1971 BC |
| Sovereign | Amenemhat II | Pharaoh | Twelfth dynasty | 1929 BC |
Question:
What is the type shown from 1991 bc?
Answer:
Sovereign