Sort array in pymongo (mongodb) depends on specific field in array

query.py

data = {"_id":"5c62ff5cdc6e89000ac76dc8"
        ,"Answers":[
  {"Text":"text1","Point":2},
   {"Text":"text2","Point":1},
   {"Text":"Hallo","Point":3}
]
 a = db.aggregate(

           [ {"$match":{"_id":objectid.ObjectId("5c62ff5cdc6e89000ac76dc8")}},
            { "$unwind": '$Answers'},
            {"$match":
                {'Answers.Text': {"$regex": "^" + "t"}}
            },
            {"$sort": {
                'Answers.Point': -1
            }}]


        )
        
       

output

  {"Text":"Hallo","Point":3}
   {"Text":"text1","Point":2}
   {"Text":"text2","Point":1}