Sentence:  However late medieval copyists were supervised — and controls were much more lax than many accounts suggest — scribes were incapable of committing the sort of "standardized" error that was produced by a <WSD>compositor</WSD> who dropped the word "not" from the Seventh Commandment and thus created the "wicked" Bible of 1631. 
Meaning of the word marked with <WSD> tags:  A person who sets type; a typesetter.