Capturing the 'sender' of an email with the Web Clipper?

What I’m trying to do

I’d like to save emails such that the sender (“From:…”) is included. Presumably, this would have to be defined as a property in the Clipper.
My client of choice is Gmail.

Things I have tried

I’ve searched and read every doc I can find, but can’t even find mention of how one might do this.
Maybe I’m missing something obvious, but I can’t figure it out.
Can someone help?

It won’t directly get the date and sender into Properties but:

In Gmail, hit reply, and then select what you need. Discard the draft or save it to send later.

Actually, I figured it out, at least for Gmail (I think).
I was able to piece together from a variety of sources that:

{{selector:span.gD?name}} ({{selector:span.gD?email}})

will produce something of the form Sender's name (sender's email address).

Note: I doubt this will work in any other client but Gmail.
But that’s good enough for me.