title: What does "for row in cur.execute ("sql query")" return?
body: <p><code>for row in cur.execute("select business_id,count(text) from reviews group by business_id"):</code></p>
  
  <p>What type of variables does this return? Is the <code>row</code> a tuple or a list?
  How do I use the <code>row</code> element in order to turn it into a string and slice it into smaller strings? </p>