Polish songs by Frédéric Chopin
... that 17 Polish songs by Frédéric Chopin were published after the composer's death as his Op.74?
... that 17 <b id="mwDrY"><a class="mw-redirect" href="./Polish_songs_by_Frédéric_Chopin" id="mwDrc" rel="mw:WikiLink" title="Polish songs by Frédéric Chopin">Polish songs by Frédéric Chopin</a></b> were published after the composer's death as his <a href="./Opus_number" id="mwDrg" rel="mw:WikiLink" title="Opus number">Op.</a>74?