unable to retrieve all fields from Candidate

Summary

We are using the API to extract all the elements from Candidate. but the following standard fields are not included in the extract

Content

We are using the API to extract  all the elements from Candidate. but the following standard fields are not included in the extract

hiredForReqDepartment
hiredForReqId
hiredForReqJobCode
hiredForReqLocation
hiredForReqTitle