Could not understand a line of code

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I could not get this line.

Could you please explain what this line is trying to do ?

Thank you

 

 

this.score= !(!Information.IsDBNull(RuntimeHelpers.GetObjectValue(dataSet.Tables[0].Rows[0][5])) & StringType.StrCmp(dataSet.Tables[0].Rows[0][5].ToString(), "", false) != 0) ? IntegerType.FromObject(dataSet.Tables[0].Rows[0][4]) : (IntegerType.FromObject(dataSet.Tables[0].Rows[0][5]) <= 0 ? IntegerType.FromObject(dataSet.Tables[0].Rows[0][4]) : IntegerType.FromObject(dataSet.Tables[0].Rows[0][5]));