You really aren't setup for success here. You have an array with o e array of objects. You should run a loop to push the objects into the observable, or you will need to look at the array[0][0] then look inside that object.
I would suggest pulling everything out of your first array and put in the observable.
There may also be a better way to approach this all together, but I haven't really thought about it, just answering the problem at hand.