title: how to skip "and" with skip rule?
body: <p>I'm working on a new antlr grammar which is similar to nattys and should recognize date expressions, but I have problem with skip rules. In more detail I want to ignore useless "and"s in expressions for example:</p>
  
  <p>Call Sam, John and Adam and fix a meeting with Sarah about the finance on Monday and Friday.</p>
  
  <p>The first two "and"s are useless. I wrote the rule bellow to fix this problem but it didn't work, why? what should I do?</p>
  
  <pre><code>    NW : [~WeekDay];
      UselessAnd : AND NW -&gt; skip;
  </code></pre>