Question: What is a common name for the effort of Kurt von Plettenberg and other German officials attempting to assassinate Adolf Hitler which originally referenced only part of the plot?
Sentence (from "Kurt von Plettenberg"): Plettenberg belonged to the circle of close friends which included Claus Schenk Graf von Stauffenberg, Johannes Popitz, Ludwig Beck, Ulrich von Hassell, Carl-Hans Graf von Hardenberg and Fabian von Schlabrendorff.
Relevant evidence: No