AFAIK, the expression language does not allow looping through data.
I a conversation, you often have the situation that multiple entities are recognized. You can easily create a response for one recognized entity. But you may want to loop through all recognized entities and create a response that includes each of them. Currently, you have to build a looping mechanism using dialog notes and counter context variables. This is extremely error prone.
instead, offer the possibility to loop e.g. through the elements of an array while createing the response.
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