Chinastark/bird_dataset huggingface dataset:
Column: START
Data format: text
Description: the start date of the allergy 
Value description: mm/dd/yy
Column: STOP
Data format: text
Description: the stop date of the allergy
Value description: mm/dd/yy
commonsense evidence: allergy period = stop - start
Column: PATIENT
Data format: text
Description: the patient id
Column: ENCOUNTER
Data format: text
Description: the medical encounter id
Column: CODE
Data format: integer
Description: the code of the allergy
Column: DESCRIPTION
Data format: text
Description: the description of the allergy