Date of Brith Contexrual Parser Model

val document_assembler = new DocumentAssembler() 
    .setInputCol("text") 
    .setOutputCol("document")

val sentence_detector = SentenceDetectorDLModel.pretrained("sentence_detector_dl_healthcare","en","clinical/models")
    .setInputCols("document")
    .setOutputCol("sentence")

val tokenizer = new Tokenizer() 
    .setInputCols("sentence") 
    .setOutputCol("token")

val dob_contextual_parser = ContextualParserModel.pretrained("date_of_birth_parser", "en", "clinical/models") 
    .setInputCols(Array("sentence", "token")) 
    .setOutputCol("chunk_dob") 

val parserPipeline = new Pipeline().setStages(Array(
        document_assembler,
        sentence_detector,
        tokenizer,
        dob_contextual_parser
        ))

model = parserPipeline.fit(spark.createDataFrame([[""]]).toDF("text"))

val result = model.transform(spark.createDataFrame([["""
Record date : 2081-01-04 
DB : 11.04.1962
DT : 12-03-1978 
DOD : 10.25.23 

SOCIAL HISTORY:
She was born on Nov 04, 1962 in London and got married on 04/05/1979. When she got pregnant on 15 May 1079, the doctor wanted to verify her DOB was November 4, 1962. Her date of birth was confirmed to be 11-04-1962, the patient is 45 years old on 25 Sep 2007.

PROCEDURES:
Patient was evaluated on 1988-03-15 for allergies. She was seen by the endocrinology service and she was discharged on 9/23/1988. 

MEDICATIONS
1. Coumadin 1 mg daily. Last INR was on August 14, 2007, and her INR was 2.3."""]]).toDF("text"))