a Japanese spy
... that Dutch authorities interned a Japanese spy, but thought he was a businessman and released him in a 1942 prisoner exchange?
... that <a href="./Dutch_East_Indies" id="mwBCc" rel="mw:WikiLink" title="Dutch East Indies">Dutch</a> authorities interned <b id="mwBCg"><a href="./Shigetada_Nishijima" id="mwBCk" rel="mw:WikiLink" title="Shigetada Nishijima">a Japanese spy</a></b>, but thought he was a businessman and released him in a 1942 <a href="./Prisoner_exchange" id="mwBCo" rel="mw:WikiLink" title="Prisoner exchange">prisoner exchange</a>?