python - Spacy BILOU 形式から spacy json 形式へ

Question

特にスペイシー トランスフォーマーを使用するために、スペイシー バージョンをナイトリーにアップグレードしようとしています。

だから私は次のような形式のスペイシーでシンプルな列車のデータセットを変換しました

td = [["Who is Shaka Khan?", {"entities": [(7, 17, "FRIENDS")]}],["I like London.", {"entities": [(7, 13, "LOC")]}],]

上から

[[{"head": 0, "dep": "", "tag": "", "orth": "Who", "ner": "O", "id": 0}, {"head": 0, "dep": "", "tag": "", "orth": "is", "ner": "O", "id": 1}, {"head": 0, "dep": "", "tag": "", "orth": "Shaka", "ner": "B-FRIENDS", "id": 2}, {"head": 0, "dep": "", "tag": "", "orth": "Khan", "ner": "L-FRIENDS", "id": 3}, {"head": 0, "dep": "", "tag": "", "orth": "?", "ner": "O", "id": 4}], [{"head": 0, "dep": "", "tag": "", "orth": "I", "ner": "O", "id": 0}, {"head": 0, "dep": "", "tag": "", "orth": "like", "ner": "O", "id": 1}, {"head": 0, "dep": "", "tag": "", "orth": "London", "ner": "U-LOC", "id": 2}, {"head": 0, "dep": "", "tag": "", "orth": ".", "ner": "O", "id": 3}]]

次のスクリプトを使用して

sentences = []
for t in td:
    doc = nlp(t[0])
    tags = offsets_to_biluo_tags(doc, t[1]['entities'])
    ner_info = list(zip(doc, tags))
    tokens = []
    for n, i in enumerate(ner_info):
        token = {"head" : 0,
        "dep" : "",
        "tag" : "",
        "orth" : i[0].orth_,
        "ner" : i[1],
        "id" : n}
        tokens.append(token)
    sentences.append(tokens)



with open("train_data.json","w") as js:
    json.dump(sentences,js)```


then i tried to convert this train_data.json using 
spacy's convert command

```python -m spacy convert train_data.json converted/```


but the result in converted folder is

```✔ Generated output file (0 documents): converted/train_data.spacy``` 

which means it doesn't created dataset

can anybody help on what i am missing

i am trying to do this with spacy-nightly