I have a text list with the following structure (all the lines on each entry start with a tab space, there are no blank lines between those lines and there is one blank line between entries):
292G.- La Ilíada ; Collection one (volume 3) ; Homer ; http://www.ataun.eus/BIBLIOTECAGRATUITA/Cl%C3%A1sicos%20en%20Espa%C3%B1ol/Homero/Iliada.pdf
- I have to download more ancient greek texts.
- Another note line.
293G.- El Quijote ; Collection one (volume 1) ; Miguel de Cervantes ; http://www.daemcopiapo.cl/Biblioteca/Archivos/7_6253.pdf
- Masterpiece.
294G.- Crimen y castigo ; Collection one (volume 4) ; Fiódor Dostoyevski ; http://www.ataun.eus/BIBLIOTECAGRATUITA/Cl%C3%A1sicos%20en%20Espa%C3%B1ol/Fedor%20Dostoiewski/Crimen%20y%20castigo.pdf
- Russian masterpiece.
295G.- La isla del tesoro ; Collection one (volume 2) ; Robert Louis Stevenson ; https://www.biblioteca.org.ar/libros/130864.pdf
- I read this one as a kid.
Going on with over 100 volumes of Collection one starting at position 292G. I wanted those 100 volumes sorted by the volume number (which can be found in the second field). The expected output is:
292G.- El Quijote ; Collection one (volume 1) ; Miguel de Cervantes ; http://www.daemcopiapo.cl/Biblioteca/Archivos/7_6253.pdf
- Masterpiece.
293G.- La isla del tesoro ; Collection one (volume 2) ; Robert Louis Stevenson ; https://www.biblioteca.org.ar/libros/130864.pdf
- I read this one as a kid.
294G.- La Ilíada ; Collection one (volume 3) ; Homer ; http://www.ataun.eus/BIBLIOTECAGRATUITA/Cl%C3%A1sicos%20en%20Espa%C3%B1ol/Homero/Iliada.pdf
- I have to download more ancient greek texts.
- Another note line.
295G.- Crimen y castigo ; Collection one (volume 4) ; Fiódor Dostoyevski ; http://www.ataun.eus/BIBLIOTECAGRATUITA/Cl%C3%A1sicos%20en%20Espa%C3%B1ol/Fedor%20Dostoiewski/Crimen%20y%20castigo.pdf
- Russian masterpiece.
I suppose sort has the answer here, but this is beyond my rookie skills.
