sally_acorn_(satam) -> sally_acorn
sally_acorn_(satam_pilot) -> sally_acorn
sally_acorn_(archie) -> sally_acorn
sally_acorn_(post-sgw) -> sally_acorn

Reason: There are several versions of Sally's character, so it makes no sense to use the same tag when they are not the same person.

What do you want to do with these tags? Alias them? Imply them? Use Sally Acorn as an umbrella tag? Regardless, this isn't how you make a BUR. You need to use a New BUR form. For templates you can use for making line commands, you can click that little "Help" under the Script box.

I tried to do it and I got the following:
"Error: Unparseable line: sally_acorn_(satam) -> sally_acorn, Script Unparseable line: sally_acorn_(satam) -> sally_acorn".

14october said:
I tried to do it and I got the following:
"Error: Unparseable line: sally_acorn_(satam) -> sally_acorn, Script Unparseable line: sally_acorn_(satam) -> sally_acorn".

That's because you're not telling it to do anything.
If you are trying to make an alias it should look like alias sally_acorn_(satam) -> sally_acorn. An alias means that when the sally_acorn_(satam) tag is used it will be automatically replaced with the sally_acorn tag.
If you are trying to make an implication it should look like imply sally_acorn_(satam) -> sally_acorn. An implication means that when the sally_acorn_(satam) tag is used the sally_acorn tag with automatically be added to it.

Now before you do this, you should probably discuss if this should be an alias or an implication. These look very redundant to me, so I'd suggest an alias.