{"ob_id":95745,"names":[],"terms":[{"ob_id":27814,"label":"long_name","value":"Ca","vocabulary":""},{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":66090,"label":"var_id","value":"5","vocabulary":""},{"ob_id":69291,"label":"standard_name","value":"the concentration of water soluble Ca in PM2.5","vocabulary":""}]}