id,first_name,last_name,city,country,birthdate,age,json_data,int_with_na
1,John,Doe,Los Angeles,US,1980-01-01,40,{"foo": {"bar": "baz"}},10
2,Jane,Doe,Los Angeles,US,2000-12-31,39,{"foo": {"bar": "baz"}},20
3,Jane,Smith,Paris,FR,2001-11-11,28,{"foo": {"bar": "baz"}},NA