{"ob_id":65508,"names":[],"terms":[{"ob_id":64470,"label":"units","value":"","vocabulary":""},{"ob_id":67830,"label":"var_id","value":"15","vocabulary":""},{"ob_id":69239,"label":"long_name","value":"Mn ","vocabulary":""},{"ob_id":69276,"label":"standard_name","value":"the concentration of water soluble Mn in PM2.5","vocabulary":""}]}