Hi,
Not sure why this question didn't show up in our list, apologies for the delay.
All the four fields listed above by your are the optional secondary fields that we offer to our customers which they can pass as part of their request payload to further filter out the results, based on how close each field is compared to the world-check data the corresponding you will receive the field results value is received which can be MATCHED, NOT_MATCHED, UNKNOWN.
Please refer to the API technical documentation for in-depth details.
Hope this answers your query.
Regards