standardize "of" usage function
standardize_of.Rddetects whether "of" is a part of the title, or separator for example, TITLE OF TITLE is fine, "AS OF DATE" is not
if "of" is part of a date (and namely as of), then we replace with "SINCE" for also gets mapped to of?
depending on context, we can add in "of" between vice president or director and its subject