[antlr-interest] Antlr Ant task

[Gaius Centus Novus]

Can somebody point me to the library that includes the Antlr Ant task?  I've got

<antlr target="MyLexer.g">
  <classpath refid="build.classpath" />
</antlr>

In ${build.classpath} I have antlr-3.1.jar, antlr-2.7.7.jar,
antlr-runtime-3.1.jar, and stringtemplate-3.2.jar.  None of those
seems to include the task.

Thanks,
Gaius