title: Extracting specific part of each line in file based on prior string
body: <p>I have a file with lines like the one here:</p>
  
  <pre><code>intergenic  NONE(dist=NONE),ENSG00000223972(dist=1692)  1   10177   10177   -   C   1   10177   rs367896724 A   AC  100 PASS    AC=2130;AF=0.425319;AN=5008;NS=2504;DP=103152;EAS_AF=0.3363;AMR_AF=0.3602;AFR_AF=0.4909;EUR_AF=0.4056;SAS_AF=0.4949;AA=|||unknown(NO_COVERAGE);VT=INDEL
  </code></pre>
  
  <p>What I would like to do is extract parts I require using the start and end chars. So for instance I would like to extract the value of <code>AFR_AF</code>. What I know is that this value begins with <code>AFR_AF</code> and ends with <code>;</code> (the whole thing looks like: <code>AFR_AF=0.4909;</code> so I want the <code>0.4909</code>.</p>
  
  <p>I would like to extract multiple parts of each line like to if possible. Is this possible using something like awk?</p>