Assertion: bomb's material | /r/ObjectUse | used in dirty bomb
Facets:
Source sentences:
text: It is far more likely that radioactive materials used in a dirty bomb would come from low-level radioactive sources.
text: Because of the dangerous and difficult aspects of obtaining high-level radioactive materials from a nuclear facility, there is a greater chance that the radioactive materials used in a dirty bomb would come from low-level radioactive sources.