All People

table file.tags
from "notes/people"
where regexmatch("^[a-zA-Z0-9]", file.name)
sort regexreplace(file.name, ".*\s([\w'-]*)$","$1") asc

Groups

list
from "notes/people"
where regexmatch("^(?![a-zA-Z0-9])", file.name)
and file.path != this.file.path