Assertion list for term "known with mass numbers".

Results from Ascent++: 4
isotope (aspect of californium) ReceivesActionknown with mass numbers 0.25
isotope (aspect of plutonium) ReceivesActionknown with mass numbers 0.25
isotope (aspect of thorium) ReceivesActionknown with mass numbers 0.25
isotope (aspect of uranium) ReceivesActionknown with mass numbers 0.25