Chinastark/bird_dataset huggingface dataset:
Column: ProductPhotoID
Name: Product Photo ID
Data format: integer
Description: Product photo identification number.
Column: Primary
Data format: integer
Description: Whether this photo is the principal image or not.
Value description: 0 = Photo is not the principal image. 
1 = Photo is the principal image. 
commonsense evidence:
staff can mention "principal" in the question in order to make the question more realistic.
Column: ModifiedDate
Name: Modified Date
Data format: datetime