{"ob_id":67366,"names":[],"terms":[{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":67744,"label":"var_id","value":"9","vocabulary":""},{"ob_id":72010,"label":"standard_name","value":"the concentration of sodium ion in PM2.5","vocabulary":""},{"ob_id":72011,"label":"long_name","value":"sodium ion","vocabulary":""}]}