Original sentence: In 1981 the by then unused bunker was squatted or occupied by members of onkruit, a local left wing anti-military organisation and the files were put up for auction at Paradiso in Amsterdam, and confiscated by military police shortly afterwards
Edited sentence: In 1981 the by then unused bunker was squatted (or rather: occupied) by members of onkruit, a local left wing anti-military organisation and the files were put up for auction at Paradiso in Amsterdam, and confiscated by military police shortly afterwards