请列举拜占庭帝国的历代皇帝，并按年代顺序排列，用json格式输出。
user
```json
{
  "Emperors of Byzantium": [
    {"name": "Constantine I", "reign": "306-337"},
    {"name": "Constantine II", "reign": "337-340"},
    {"name": "Constans I", "reign": "337-350"},
    {"name": "Constantius II", "reign": "337-361"},
    {"name": "Julian", "reign": "361-363"},
    {"name": "Jovian", "reign": "363-364"},
    {"name": "Valentinian I", "reign": "364-375"},
    {"name": "Valens", "reign": "364-378"},
    {"name": "Theodosius I", "reign": "379-395"},
    {"name": "Arcadius", "reign": "395-408"},
    {"name": "Theodosius II", "reign": "408-450"},
    {"name": "Marcian", "reign": "450-457"},
    {"name": "Leo I", "reign": "457-474"},
    {"name": "Leo II", "reign": "474"},
    {"name": "Zeno", "reign": "474-475, 476-491"},
    {"name": "Basiliscus", "reign": "475-476"},
    {"name": "Anastasius I", "reign": "491-518"},
    {"name": "Justin I", "reign": "518-527"},
    {"name": "Justinian I", "reign": "527-565"},
    {"name": "Justin II", "reign": "565-578"},
    {"name": "Tiberius II", "reign": "578-582"},
    {"name": "Maurice", "reign": "582-602"},
    {"name": "Phocas", "reign": "602-610"},
    {"name": "Heraclius", "reign": "610-641"},
    {"name": "Constans II", "reign": "641-668"},
    {"name": "Constantine IV", "reign": "668-685"},
    {"name": "Justinian II", "reign": "685-695, 705-711"},
    {"name": "Leontios", "reign": "695-698"},
    {"name": "Tiberios III", "reign": "698-705"},
    {"name": "Philippikos", "reign": "711-713"},
    {"name": "Anastasius II", "reign": "713-715"},
    {"name": "Theodosius III", "reign": "715-717"},
    {"name": "Leo III", "reign": "717-741"},
    {"name": "Constantine V", "reign": "741-775"},
    {"name": "Leo IV", "reign": "775-780"},
    {"name": "Constantine VI", "reign": "780-797"},
    {"name": "Irene", "reign": "797-802"},
    {"name": "Nicephorus I", "reign": "802-811"},
    {"name": "Stauracius", "reign": "811"},
    {"name": "Michael I", "reign": "811-813"},
    {"name": "Theophilus", "reign": "813-820"},
    {"name": "Michael II", "reign": "820-829"},
    {"name": "Theodisius I", "reign": "829-842"},
    {"name": "Michael III", "reign": "
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