This bug was fixed in the package congress - 6.0.0-0ubuntu1.1
--------------- congress (6.0.0-0ubuntu1.1) artful; urgency=medium
* d/control: Add python-antlr3 to Depends (LP: #1687298).
-- Corey Bryant <email address hidden> Fri, 01 Sep 2017 10:26:47 -0400
This bug was fixed in the package congress - 6.0.0-0ubuntu1.1
---------------
congress (6.0.0-0ubuntu1.1) artful; urgency=medium
* d/control: Add python-antlr3 to Depends (LP: #1687298).
-- Corey Bryant <email address hidden> Fri, 01 Sep 2017 10:26:47 -0400