bin/analyse_text.pl --input-corpus data/2.short.shelley.txt --ngram-length 8 
...
    "elixir|of|life|is|a|chimera|but|these" => 1,
    "the|elixir|of|life|is|a|chimera|but"   => 1,
...

# and
bin/analyse_text.pl --input-corpus data/2.short.shelley.txt --ngram-length 8  --process-paragraphs
...
    "been|done|exclaimed|the|soul|of|Frankenstein|more"   => 1,
    "done|exclaimed|the|soul|of|Frankenstein|more|far"    => 1,
    "exclaimed|the|soul|of|Frankenstein|more|far|more"    => 1,
    "Frankenstein|more|far|more|will|I|achieve|treading"  => 1,
    "has|been|done|exclaimed|the|soul|of|Frankenstein"    => 1,
    "of|Frankenstein|more|far|more|will|I|achieve"        => 1,
    "soul|of|Frankenstein|more|far|more|will|I"           => 1,
    "the|soul|of|Frankenstein|more|far|more|will"         => 1,
...