You can use ~ to indicate the subject that is being talked or written about.
He refused to divulge any information ~ the man’s whereabouts.
= concerning
PREP
You can use ~ to indicate the subject that is being talked or written about.
He refused to divulge any information ~ the man’s whereabouts.
= concerning
PREP
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012