chapter,source_type,rows 01,ncm_official,29 01,synthetic,32 04,ncm_official,5 04,synthetic,8 05,ncm_official,8 05,synthetic,8 07,ncm_official,28 07,synthetic,8 10,ncm_official,14 10,synthetic,25 12,ncm_official,14 12,synthetic,32 23,ncm_official,17 23,synthetic,24 25,ncm_official,4 25,synthetic,8 31,ncm_official,36 31,synthetic,43 38,ncm_official,70 38,synthetic,8 72,ncm_official,8 72,synthetic,8 73,ncm_official,16 73,synthetic,24 82,ncm_official,7 82,synthetic,8 84,ncm_official,55 84,synthetic,39 85,ncm_official,25 85,synthetic,8 87,ncm_official,23 87,synthetic,16