:The value is treated as a [[title list|Title List]]. Each title in the list considered in turn. If it has not been encountered before, it is appended to the output.
Note that if a tiddler does not contain field <<.place F>>, it is treated as if the value of the field were empty. Thus, a filter expression such as `[each[motovun]]` will return one tiddler that doesn't have a `motovun` field, as well as one tiddler with each distinct value of that field, if any. To obtain just the tiddlers that have a non-blank value for the `motovun` field one can use `[each[motovun]has[motovun]]`.