Give you a statement and table with its title, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a ternary classification problem, you should choose the answer among supported, refuted and neutral. Table cells in one row are seperated by '|', and different rows are seperated by '
'. If cell value is a list, we use '	' to seperate each list element.

Table:
| Median Empire | c. 678 BC |
| Archemenid Empire | 550 BC |
| Parthian Empire | 247 BC |
| Sasanian Empire | 224 BC |
| Buyid Empire | 934 BC |
| Safavid Empire | 1501 |
| Islamic Republic | 1 April 1979 |
| Current constitution | 24 October 1979 |
| Constitution amended | 28 July 1989 |
Title:
Islamic Republic of Iran
Statement:
The Parthian Empire is considered by historians to have been one of the most powerful in the world during its existence.
Answer:
neutral