code: def span(annotation):
      # represents annotation by its char start and end idx
      return (annotation["start"], annotation["end"])
  
file_path: finetune/finetune/encoding/sequence_encoder.py
imports: import warnings
  import numpy
  from finetune.encoding.input_encoder import get_spacy
label_desc: Use image node_id 5 for calling a global function with example usage: span(annotation) and returns: annotation,  annotation