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:
| Frequency | Station | Operator | Country of origin | Transmitter location | Format |
| --- | --- | --- | --- | --- | --- |
| 5.965MHz (SW) | Radio Klasik | RTM | Malaysia | IBC , Malaysia | News and Music |
| 15420kHz (SW) | Radio Free Sarawak | RFS | Malaysia | Unknown | News and Music |
| 1242kHz | Voice of Vietnam | VOV | Vietnam | Can Tho , Vietnam | News and Music |
| 1575kHz | Voice of America | VOA | United States of America | Bangkok , Thailand | News and Music |
| 891kHz 981kHz | Sor. Wor. Thor | RTWS | Thailand | Saraburi (891) and Yala (981), Thailand | Talk , Music and News |
| 684kHz | China Radio International | CRI | China | Hainan , China | News |
| 918kHz | Radio Thailand Network Six | RTWS | Thailand | Bangkok , Thailand | News , Music |
| 873kHz | Voice of Vietnam 4 | VOV | Vietnam | Can Tho , Vietnam | Talks and Music |
| 603kHz | China Radio International | CRI | China | Hainan , China | News |
| 1503kHz | Radio Taiwan International | RTI | Taiwan | Fangliao , Taiwan | News |
Question:
Which station has a frequency of 873khz?
Answer:
Voice of Vietnam 4