I based my Census search on this individual:

- FH snip.JPG (93.98 KiB) Viewed 6842 times
And a snip from the plugin return where line 3 has a null return in FMP:

- FH Plugin snip.JPG (74.77 KiB) Viewed 6842 times
Everything in line 3 is correct except for the hyperlink to FMY which returns no record.
Hope this gives you the information you need.
Peter