{"distribution":{"A":27,"B":88,"C":0,"F":1},"filters":{"country":"CN","incident_type":null},"rules":{"A":"else","B":"n_sources >= 1 AND avg_confidence >= 0.7","C":"n_sources >= 2 AND n_domains >= 3","F":"duration_hours >= 24 AND n_sources >= 2"},"total":121,"ungraded":5}