This code works on both file and folder level

• How to run the code
• For a single file:
  • python extract_ner_data_from_ssf_into_conll_format.py --input input.txt --output output.txt
• For files/folder:
  • python extract_ner_data_from_ssf_into_conll_format.py --input Input-Folder --output Output-Folder --merge all_merged.txt