title: Convert PCFG to CNF?
body: <p>I have this rule in a grammar :</p>
  
  <pre><code>VP-&gt;Verb NP NP   [0.05]
  VP-&gt;Verb NP PP   [0.1]
  </code></pre>
  
  <p>I want to convert this PCFG(Probabilistic Context Free grammar ) to CNF(Chomsky Normal Form)</p>
  
  <p>To do that I know we can split the rule into two non-terminals </p>
  
  <pre><code>VP-&gt;@V_N NP
  VP-&gt;@V_N PP
  @V_N-&gt;Verb NP
  </code></pre>
  
  <p>Which probability to set for each rule?</p>
  
  <p>Thanks</p>