contaminated with drugs
... that 80% of all British banknotes are contaminated with drugs?
... that 80% of all British <a href="./Banknote" id="mwUQ" rel="mw:WikiLink" title="Banknote">banknotes</a> are <b id="mwUg"><a href="./Contaminated_currency" id="mwUw" rel="mw:WikiLink" title="Contaminated currency">contaminated with drugs</a></b>?