Complex sentence: The latter habit is said to originate from the Lancashire textile mills, where machinery was so loud that mill workers needed to use their hands to communicate as well using exaggerated mouthing of words, known as "mee-mawing".
Split into simpler sentences: The latter habit is said to originate from the Lancashire textile mills, where machinery was so loud that mill workers needed to use their hands to communicate. They also used an exaggerated mouthing of words, known as "mee-mawing".