"The surface called \"surface\" means the lower boundary of the atmosphere. \"Content\" indicates a quantity per unit area. \"Radioactivity\" means the number of radioactive decays of a material per second. \"Ag\" means the element \"silver\" and \"109mAg\" is the metastable state of the isotope \"silver-109\" with a half-life of 4.58e-04 days."@en .
"2018-02-12 16:53:18.0" .
.
.
"SDN:P07::5HV8F33O" .
"1" .
"surface_radioactivity_content_of_109mAg"@en .
"SDN:P07::5HV8F33O" .
.
"1" .
.
"SDN:P07::5HV8F33O" .
"2018-02-12 16:53:18.0" .
"" .
.
"false" .
.
"accepted"@en .