{"ob_id":67361,"names":[],"terms":[{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":66091,"label":"var_id","value":"6","vocabulary":""},{"ob_id":72000,"label":"standard_name","value":"the concentration of chloride ion in PM2.5","vocabulary":""},{"ob_id":72001,"label":"long_name","value":"chloride ion","vocabulary":""}]}