pragma strict create List of Array of strings for class?

I’m declaring a class that holds animation frames, each frame is a list of rotations which are strings.

for example animation[0].frames[0]=a list of strings.
pragma strict
class animation{
var name:String;
var frames:?
}

how do I declare the frames class using lists?
I’m writing this with < as t because this field erases my tags.
My guesses so far are not working…
frames:[List.tStringt,List.tStringt?]

Thanks,

This post seems to cover it. They’re called Jagged Lists…

http://answers.unity3d.com/questions/42716/can-you-define-a-jagged-generic-list-in-unityscrip.html