And this is a podcast episode (from Sporkful) on the same problem: 
<a href="http:&#x2F;&#x2F;www.sporkful.com&#x2F;what-makes-a-sandwich-a-sandwich&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.sporkful.com&#x2F;what-makes-a-sandwich-a-sandwich&#x2F;</a>