{"ob_id":65487,"names":[],"terms":[{"ob_id":35986,"label":"long_name","value":"Sr","vocabulary":""},{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":67849,"label":"var_id","value":"22","vocabulary":""},{"ob_id":69250,"label":"standard_name","value":"the concentration of total Sr in PM2.5","vocabulary":""}]}