title: Shape of Input in Functional Keras
body: <p>I want to do a word embedding + BLSTM in keras using a functional model. I have to declare the input as:</p>
  
  <pre><code>inputs = Input(shape=(X,))
  </code></pre>
  
  <p>Which should be the value of <code>X</code> here? Since the inputs will be sentences, I am not very sure what I should put in there.</p>