How to extract the best candidate after token classification?
Let's assume the model predicts the following for an input sequence.
```
The O            
creation. O
date O
is O
27 B-DATE
Aug I-DATE
2020 I-DATE
and  O
update. O
date.  O
is  O
01-09-2020 B-DATE
```

How do you pick the best candidate for **creation date** from logist values? 
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