[
  header ["hhh1" ]
  block [
    line ["text1" ]
  ]
  header ["hhh2" ]
  block [
    line ["text2" ]
  ]
  header ["hhh3" ]
  block [
    para ["paraA paraZ" ]
  ]
  header ["hhh4" ]
  block [
    para ["paraA paraI" ]
    para ["paraJ paraZ" ]
  ]
]