State of the art ; Sampling; Language corpus; Sprachkorpus; Datensammlung; Data collection; Textkorpus (method.) ; Text corpus (method.) ; Corpus linguistics ; Corpus di Italiano Scritto ; CoLFIS ; C-ORAL-ROM ; Lingua italiana di segni; LIS; Italian Sign Language ; Gebärdensprachkorpus; Sign language corpus; Text corpus (sign language) ; Written language ; Spoken language ; Techniques (in research) ; Research techniques ; Italian