Searching for Notes with Only the "X" Tag and excluding others that also have this "X" tag but have other tags besides "X"

[obsidiandme]

My vault has tags in YAML frontmatter as properties

Case 1

I have some notes having only the person tag i.e.,

Note 1

tags:
  - person

Case 2

Then there are some notes, that have tags besides the person tag i.e.,
Note 2

tags:
  - atag
  - person
  - adifferenttag

or
Note 3

tags:
  - person
  - atag1

or
Note 4

tags:
  - atag2
  - person

What I’m trying to do

I want to search for notes that have only the person tag but I don’t want any notes to appear in my search results that have any other tags besides the person tag i.e., Note 1 should appear but not Note 2, Note 3 or Note 4

[obsidiandme]

/tags:\n\s*-\s*person\s*\n(?!.*-\s*)/