title: Task Dependency in org-mode
body: <p>I am trying to setup org-capture or org file for following issue:  </p>
  
  <p>Task A is the major  task.  It depend upon minor tasks B and Task C.
   Now in org-agenda view, I should be able to see Task B and Task C.<br>
   When they are done, I should be able to see Task A in agenda.  I want to generalize if possible such as Task B can depend upon Task D and Task E.</p>
  
  <p>How I can achieve that?<br>
  Thanks.</p>