Description
A Part of Speech classifier predicts a grammatical label for every token in the input text. Implemented with an averaged perceptron architecture.
Predicted Entities
- ADJ
- ADP
- ADV
- AUX
- CCONJ
- DET
- NOUN
- NUM
- PART
- PRON
- PROPN
- PUNCT
- VERB
- X
Live Demo Open in Colab Download Copy S3 URI
How to use
document_assembler = DocumentAssembler()\
.setInputCol("text")\
.setOutputCol("document")
sentence_detector = SentenceDetector()\
.setInputCols(["document"])\
.setOutputCol("sentence")
tokenizer = Tokenizer()\
.setInputCols("sentence")\
.setOutputCol("token")
pos = PerceptronModel.pretrained("pos_btb", "bg")\
.setInputCols(["document", "token"])\
.setOutputCol("pos")
pipeline = Pipeline(stages=[
document_assembler,
sentence_detector,
tokenizer,
posTagger
])
example = spark.createDataFrame([['Столица на Република България е град София .']], ["text"])
result = pipeline.fit(example).transform(example)
val document_assembler = DocumentAssembler()
.setInputCol("text")
.setOutputCol("document")
val sentence_detector = SentenceDetector()
.setInputCols("document")
.setOutputCol("sentence")
val tokenizer = Tokenizer()
.setInputCols("sentence")
.setOutputCol("token")
val pos = PerceptronModel.pretrained("pos_btb", "bg")
.setInputCols(Array("document", "token"))
.setOutputCol("pos")
val pipeline = new Pipeline().setStages(Array(document_assembler, sentence_detector,tokenizer, pos))
val data = Seq("Столица на Република България е град София .").toDF("text")
val result = pipeline.fit(data).transform(data)
import nlu
text = [""Столица на Република България е град София .""]
token_df = nlu.load('bg.pos.btb').predict(text)
token_df
Results
+--------------------------------------------+-------------------------------------------------+
|text |result |
+--------------------------------------------+-------------------------------------------------+
|Столица на Република България е град София .|[NOUN, ADP, NOUN, PROPN, AUX, NOUN, PROPN, PUNCT]|
+--------------------------------------------+-------------------------------------------------+
Model Information
| Model Name: | pos_btb |
| Compatibility: | Spark NLP 2.7.5+ |
| License: | Open Source |
| Edition: | Official |
| Input Labels: | [sentence, token] |
| Output Labels: | [pos] |
| Language: | bg |
Data Source
The model was trained on the Universal Dependencies data set.
Benchmarking
| | precision | recall | f1-score | support |
|--------------|-----------|--------|----------|---------|
| ADJ | 0.89 | 0.87 | 0.88 | 1377 |
| ADP | 0.95 | 0.95 | 0.95 | 2238 |
| ADV | 0.94 | 0.92 | 0.93 | 671 |
| AUX | 0.98 | 0.97 | 0.97 | 916 |
| CCONJ | 0.96 | 0.95 | 0.96 | 467 |
| DET | 0.91 | 0.88 | 0.90 | 273 |
| INTJ | 1.00 | 1.00 | 1.00 | 1 |
| NOUN | 0.92 | 0.93 | 0.93 | 3486 |
| NUM | 0.89 | 0.87 | 0.88 | 223 |
| PART | 0.98 | 0.96 | 0.97 | 210 |
| PRON | 0.97 | 0.97 | 0.97 | 981 |
| PROPN | 0.88 | 0.89 | 0.89 | 805 |
| PUNCT | 0.95 | 0.96 | 0.95 | 2268 |
| SCONJ | 0.98 | 0.97 | 0.98 | 156 |
| VERB | 0.95 | 0.94 | 0.94 | 1652 |
| accuracy | | | 0.94 | 15724 |
| macro avg | 0.94 | 0.94 | 0.94 | 15724 |
| weighted avg | 0.94 | 0.94 | 0.94 | 15724 |