That's not a full dump of subtitles, but rather of list of which subtitles they have, with download links. Here are the first lines of the `subtitles_all.txt` file:

    IDSubtitle MovieName MovieYear LanguageName ISO639 SubAddDate ImdbID SubFormat SubSumCD MovieReleaseName MovieFPS SeriesSeason SeriesEpisode SeriesIMDBParent MovieKind URL
    1 Alien3 1992 English en 2004-10-31 23:54:23 103644 sub 2  Alien.3 11.000 0 0 0 movie http://www.opensubtitles.org/subtitles/1/alien3-en
    2 Identity 2003 Slovenian sl 2004-10-31 23:54:23 309698 sub 1  Identity.DVDRiP.XViD 0.000 0 0 0 movie http://www.opensubtitles.org/subtitles/2/identity-sl
    3 Ghost in the Shell 2: Innocence 2004 English en 2004-10-31 23:54:23 347246 srt 1  Innocence.2004.DVDRip.XviD 23.980 0 0 0 movie http://www.opensubtitles.org/subtitles/3/ghost-in-the-shell-2-innocence-en