{"model_id":"a","location":"222","weight":0.1}
{"model_id":"b","location":"222","weight":0.2}
{"model_id":"c","location":"222","weight":0.3}
{"model_id":"d","location":"222","weight":0.4}
{"model_id":"a","location":"888","weight":0.4}
{"model_id":"b","location":"888","weight":0.3}
{"model_id":"c","location":"888","weight":0.2}
{"model_id":"d","location":"888","weight":0.1}