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:
| Throne Name | Title | Born-Died | Entered office | Left office | Family Relations |
| --- | --- | --- | --- | --- | --- |
| Diylamids of Fars (933–1062) | Diylamids of Fars (933–1062) | Diylamids of Fars (933–1062) | Diylamids of Fars (933–1062) | Diylamids of Fars (933–1062) | Diylamids of Fars (933–1062) |
| 299 | Abolhasan, Emir | ?892 – 949 | 933 | 949 | son of Buyeh |
| 305 | Abushoja', Emir | 937–982 | 949 | 982 | son of Rokn od-Dowleh |
| 309 | Abolfavares, Emir | 962–989 | 982 | 989 | son of Azad od-Dowleh |
| 313 | Abuali, Emir | ? – 989 | 989 | 989 | son of Sharaf od-Dowleh |
| 310 | Abukalijar, Emir | 964–998 | 989 | 998 | son of Azad od-Dowleh |
| 316 | Emir | ? – 1000? | 998 | 999 | son of Izz od-Dowleh |
| 312 | Abunasr, Emir | 970–1012 | 999 | 1012 | son of Azad od-Dowleh |
| 317 | Abushoja', Emir | 992–1024 | 1012 | 1024 | son of Baha' od-Dowleh |
| 320 | Abolfavares, Emir | 999–1028 | 1024 | 1026 | son of Baha' od-Dowleh |
| 322 | Abukalijar, Emir | ?1011 – 1048 | 1026 | 1048 | son of Soltan od-Dowleh |
| 325 | Abumansur, Emir | ? – ? | 1048 | 1048 | son of Emad od-Din |
| 326 | Abunasr, Emir | ? – 1058 | 1048 | 1050 | son of Emad od-Din |
| 325 | Abumansur, Emir | ? – ? | 1050 | 1051 | son of Emad od-Din |
| 327 | Abusa'id, Emir | ? – ? | 1051 | 1053 | son of Emad od-Din |
| 325 | Abumansur, Emir | ? – ? | 1053 | 1062 | son of Emad od-Din |
| Diylamids of Rey, Isfahan, and Hamedan (935–1038) | Diylamids of Rey, Isfahan, and Hamedan (935–1038) | Diylamids of Rey, Isfahan, and Hamedan (935–1038) | Diylamids of Rey, Isfahan, and Hamedan (935–1038) | Diylamids of Rey, Isfahan, and Hamedan (935–1038) | Diylamids of Rey, Isfahan, and Hamedan (935–1038) |
| 301 | Abuali, Emir | 898–976 | 935 | 976 | son of Buyeh |
| 307 | Abumansur, Emir | 941–983 | 976 | 983 | son of Rokn od-Dowleh |
| 308 | Abolhasan, Emir | 952–997 | 976 | 997 | son of Rokn od-Dowleh |
| 314 | Abutaleb, Emir | 993–1029 | 997 | 1029 | son of Fakhr od-Dowleh |
| 315 | Abutaher, Emir | ? – 1021 | 997 | 1021 | son of Fakhr od-Dowleh |
| 319 | Abolhasan, Emir | ? – 1023 | 1021 | 1023 | son of Shams od-Dowleh |
| 324 | Abukalijar, Emir | ? – ? | c. 1036 | c. 1038 | son of Majd od-Dowleh |
| Diylamids of Iraq and Khuzistan (945–1055) | Diylamids of Iraq and Khuzistan (945–1055) | Diylamids of Iraq and Khuzistan (945–1055) | Diylamids of Iraq and Khuzistan (945–1055) | Diylamids of Iraq and Khuzistan (945–1055) | Diylamids of Iraq and Khuzistan (945–1055) |
| 303 | Abolhosein, Emir | 915–966 | 945 | 966 | son of Buyeh |
| 306 | Abumansur, Emir | 943–977 | 966 | 977 | son of Mo'ez od-Dowleh |
| 305 | Abushoja', Emir | 937–982 | 977 | 982 | son of Rokn od-Dowleh |
| 310 | Abukalijar, Emir | 964–998 | 982 | 986 | son of Azad od-Dowleh |
| 311 | Abolfavares, Emir | 962–989 | 986 | 989 | son of Azad od-Dowleh |
| 312 | Abunasr, Emir | 970–1012 | 989 | 1012 | son of Azad od-Dowleh |
| 317 | Abushoja', Emir | 992–1024 | 1012 | 1021 | son of Baha od-Dowleh |
| 318 | Abuali, Emir | 1002–1025 | 1021 | 1025 | son of Baha' od-Dowleh |
| 321 | Abutaher, Emir | 994–1043 | 1025 | 1025 | son of Baha' od-Dowleh |
| 322 | Abukalijar, Emir | ?1011 – 1048 | 1025 | 1027 | son of Soltan od-Dowleh |
| 321 | Abutaher, Emir | 994–1043 | 1027 | 1043 | son of Baha' od-Dowleh |
| 322 | Abukalijar, Emir | ?1011 – 1048 | 1043 | 1048 | son of Soltan od-Dowleh |
| 326 | Abunasr, Emir | ? – 1058 | 1048 | 1055 | son of Emad od-Din |
Question:
What is teh born-died dates of the king with a throne name 315 and left office in 1021?
Answer:
? – 1021