Chinastark/bird_dataset huggingface dataset:
Column: userid
Name: user id
Data format: integer
Description: unique identifier number of users
Column: age
Name: age
Data format: text
Description: age
Value description: 1: 1-18 years old; 
18: 18-25 years old; 
25: 25-35 years old; 
35: 35-45 years old; 
45: 45-50 years old; 
50: 50-56 years old; 
56: over 56 years old
Column: u_gender
Name: user gender
Data format: text
Description: user gender
Value description: M / F: Male / Female
Column: occupation 
Data format: text
Description: occupation