{"ob_id":67365,"names":[],"terms":[{"ob_id":34175,"label":"var_id","value":"11","vocabulary":""},{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":72008,"label":"standard_name","value":"the concentration of potassium ion in PM2.5","vocabulary":""},{"ob_id":72009,"label":"long_name","value":"potassium ion","vocabulary":""}]}