full_name : String, gender: String, date_of_birth : Date, anniversaries : [{ type : ["death", "wedding", "feast"], day : Date }], relation : ["son", "daughter", "wife", "brother", "sister"], phone : Number, avatar : String, is_dead : Boolean
master : person_id home_latlong : String, address : { line_1: String, line_2: String, landmark: String, city: String, district: String, zip: String } }