class_docstr: Intent Extraction model base class (using tf.keras)
class_docstr_tok: ["Intent","Extraction","model","base","class","(","using","tf.keras",")"]
docstr: :obj:`tuple`:Get input shape
docstr_tok: [":","obj",":","`","tuple","`",":","Get","input","shape"]
code: def input_shape(self):
      """:obj:`tuple`:Get input shape"""
      return self.model.layers[0].input_shape
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import tensorflow
  from nlp_architect.nn.tensorflow.python.keras.layers.crf import CRF
  from nlp_architect.nn.tensorflow.python.keras.utils import load_model, save_model
label_desc: Use image node_id 6 for calling the IntentExtractionModel obj's underlying member method code with example usage: obj.input_shape() and returns: self