.
"2018-02-12 16:53:18.0" .
"SDN:P07::2YHO1NVH" .
"" .
"1" .
.
"SDN:P07::2YHO1NVH" .
"accepted"@en .
.
"false" .
"SDN:P07::2YHO1NVH" .
"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. \"Rn\" means the element \"radon\" and \"222Rn\" is the isotope \"radon-222\" with a half-life of 3.82e+00 days."@en .
.
.
"2018-02-12 16:53:18.0" .
"surface_radioactivity_content_of_222Rn"@en .
"1" .
.