Rank of a tensor--- 2x2x2 Array

tolearn

Can anybody give me an example of 2x2x2 Array whose tensor rank is 2

or

Can somebody show me why the tensor rank is two for the following 2x2x2 array. That is can you express as a sum of 2 outer products?
I am giving the entries of the first face and then the second face. I do realize I could have asked this question various other terminology--this is the one I am most comfortable one. I hope my question is clear. Thank you

1 0 0 1
01 1 0