I hope I can explain it so it's easy for you. I would need this as missing information in a string is marked as three spaces, and surprisingly doesn't perform an `\n` for the next piece of information.

Imagine I have a string like:

```
string <- "abc
   def
ghi   jkl"

```

I want the output of a regex expression (maybe with `strsplit()` with a more advanced function) to be:

```
[[1]]
[1] "abc" "" "def" "ghi" "" "jkl"

```

That splits when it finds a `\n` and that it splits and inserts a white space when it finds three spaces. I need to mark that missing info as another value. If not, that breaks my script, thinking that the next info is, for example, three spaces concatenated with the `def` string.

Thank you