=== N distribution ===
  '어문' : 84
  '어문,이미지' : 11
  '기타' : 1
  None : 1
=== O/P/Q distribution ===
  ('미부착', None, None) : 96
  (None, None, None) : 1
=== sample N by row ===
  r13 '연구보고서' N='어문' O='미부착'
  r14 '동향분석' N='어문' O='미부착'
  r15 '정기간행물' N='어문' O='미부착'
  r16 '실태조사 및 통계' N='어문' O='미부착'
  r17 '역대발간물' N='어문' O='미부착'
  r43 '공지사항' N='어문' O='미부착'
  r44 '보도자료' N='어문' O='미부착'
  r47 '포토뉴스' N='어문,이미지' O='미부착'
  r86 '기관장 인사말' N='어문,이미지' O='미부착'
  r88 '조직도' N='어문' O='미부착'