Pass in lists of texts as follows in the rich text editor (everything between '**' is an expression):
[*lists_of_texts(-> can be whatever):format as text*]

-> content to show per list of texts:
[*This list_of_text:format as text*]

-> Delimiter:
,

Then further
-> content to show per list item:
"*This text*"

-> Delimiter:
,


The return objects are:
intersected_textlist:  is a list of texts that are present in all lists

list-empty: returns true, when intersected list is empty