{"ob_id":95750,"names":[],"terms":[{"ob_id":27777,"label":"long_name","value":"Ni","vocabulary":""},{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":67839,"label":"var_id","value":"18","vocabulary":""},{"ob_id":69279,"label":"standard_name","value":"the concentration of water soluble Ni in PM2.5","vocabulary":""}]}