Complex sentence: The medal is attached to a yellow ribbon, a reference to the yellow star that Jews have to wear in the Holocaust, twice recipient of the medal wear a small clasp in the form of the medal on it's ribbon.
Split into simpler sentences: The medal is attached to a yellow ribbon, a reference to the yellow star that Jews were forced to wear during the Holocaust. Two time recipients of the medal wear a small clasp in the form of the medal on it's ribbon.