How can I combine overlapping marginnotes in ConTeXt?

Question

I'm working on a project very similar to the one described in this question, only for various reasons I'm using ConTeXt rather than that poster's use of XeLaTeX.

I too am typesetting a text with verse/line numbers in the margin and am interested in combining them should there happen to be two that end up on the same line, dividing them with a slash or a comma or something like that.

The comments there allude to a possible solution in ConTeXt with the possible use of \EveryLine, but I have not yet been able to figure out how to implement a solution using that command - I think I'm a bit newer at various implementations of TeX than the previous questioner! Is there a reliable way to implement this in ConTeXt?

EDITED TO ADD:

A very simple MWE:

\starttext

\inmargin{1}Now we are engaged in a great civil war.
\inmargin{2}We are testing whether that nation or any nation so conceived 
and so dedicated, can long endure.
\inmargin{3}We are met on a great battle-field of that war.

\stoptext

Results in:

I would like the 1 and 2 not to be overlapping, nor to be stacked like the \setupmargindata[stack=yes] would get me, but rather to automatically combine those that would overlap to get something like "1,2" that would look like:

I would appreciate any help...thank you!