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:
| Battle | Date | Bulgarian Commander | Latin Commander | Result |
| --- | --- | --- | --- | --- |
| Battle of Adrianople | 14 April 1205 | Kaloyan | Baldwin I | Bulgarian victory |
| Battle of Serres | June 1205 | Kaloyan | Unknown | Bulgarian victory |
| Battle of Rusion | 31 January 1206 | Kaloyan | Thierry de Termond | Bulgarian victory |
| Battle of Rodosto | February 1206 | Kaloyan | Unknown | Bulgarian victory |
| Battle of Messinopolis | 4 September 1207 | Unknown | Boniface of Montferrat | Bulgarian victory |
| Battle of Boruy | June 1205 | Boril | Henry I | Bulgarian victory |
| Battle of Philippopolis | 31 June 1208 | Boril | Henry I | Latin victory |
| Siege of Constantinople | 1235 | Ivan Asen II | John of Brienne | Two Year Truce |
Question:
What is the Bulgarian Commander of the Battle of Rusion?
Answer:
Kaloyan