Strange output format for phrase extraction. about petrarch2 HOT 2 OPEN

{(u'---COPLEG', u'---GOV', u'041'): [[u'CALLED'], [u'HAS']],
 u'actorroot': {(u'---COPLEG', u'---GOV', u'041'): [u'', u'']},
 u'actortext': {(u'---COPLEG', u'---GOV', u'041'): [u'deputy ... Congress',
   u'Governor']},
 u'eventtext': {(u'---COPLEG', u'---GOV', u'041'): u'has called'},
 u'nouns': [([u' CONGRESS'], [u'~LEG'], [[u'~']]),
  ([u' DEPUTY', u' CONGRESS'], [u'~COPLEG'], [[u'~'], [u'~']]),
  ([u' GOVERNOR'], [u'~GOV'], [[u'~']]),
  ([u' ADMINISTRATION'], [u'~GOV'], [[u'~']])]}