Gender should not be required, and reduced the amount of data passed around

[egonw]

Fixes #2347

Description

Adds the suggestion OPTIONAL and DISTINCT

Caveats

Please list anything which has been left out of this PR or which should be considered before this PR is accepted
Check any of the following which apply:

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
  • I have made corresponding changes to the documentation
• This change requires new dependencies (please list)

Testing

Compare http://127.0.0.1:8100/organization/Q24283660 before and after the patch.

More people should show up:

Checklist

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have not used code from external sources without attribution
• I have considered accessibility in my implementation
• There are no remaining debug statements (print, console.log, ...)