title: Filter rows with overlapping region
body: <p>How can i remove a row in which the start and end of one row overlaps with other row in the same chr? –</p>
  
  <pre><code>   R_level  logp   chr start   end     CNA    Gene
          2   7.0    1  1159    4360    gain   Recl,Bcl
          1   2.4    1  1101    3689    gain   Bc1
          4   1.9    2  7180    9229    loss   Sox1,Tert
          2   4.5    2  8159    8360    loss   Sox1
          1   2.9    2  9154    10588   loss   Pekg
  </code></pre>
  
  <p>I want output some thing like this                                                             </p>
  
  <pre><code>R_level  logp   chr start   end     CNA    Gene
      2   7.0    1  1159    4360    gain   Recl,Bcl
      4   1.9    2  7180    9229    loss   Sox1,Tert
      1   2.9    2  9154    10588   loss   Pekg
  </code></pre>