Now don't run ?

[leprechaun]

Cool.
Could someone elaborate a bit on the reason that the proposed sollution works? Would be really helpful. I am confused because of the double list and the vector [2] which I cannot explain.

edit: well some thinking and a fresh cup of coffee made me realize that [2] is the allowed type String. Is it right that in this case the entry is converted to an unevaluated string because you specified that the allowed type is string?