This is a cut and paste from my post:
“I've seen the movie and read about it over 20 years ago, long before the movie.”
“read about it 20 years ago “ means reading in a book about the Manhattan Project, not watching the movie.
That clear enough, Mister Dunderhead?
You forgot to notice your use of the conjunction “and” without and interveming comma.
Inflection and intination and pauses for breath do not show up in written text.