[tag=IN] [word=the] [lemma=number] [word=of] [□=□]
[tag=IN] [word=the] [lemma=number] [word=of] [lemma=□]
[tag=IN] [word=the] [lemma=number] [word=of] [word=□]
Firstly , overlap between shared files based on the number of files in common .