title: Get String Between Two Other Strings in ObjC
body: <p>I am trying to parse a string and get another string in the middle.</p>
  
  <p>ie. </p>
  
  <p>Hello world this is a string</p>
  
  <p>I need to find the string between "world" and "is" (this). I have looked around but haven't been able to figure it out yet, mainly because I am new to Objective C... Anyone have an idea of how to do this, with RegEx or without?</p>