TimeDistributed is not defined

`TimeDistributed` is a class in the Keras API for applying a layer to every temporal slice of an input tensor. It seems like you are trying to use it but it is not defined.

This error message usually occurs when the Keras API is not imported properly. Make sure you have imported the `TimeDistributed` class from the `keras.layers` module. Here is an example import statement:

from keras.layers import TimeDistributed

If you are using a different deep learning library, make sure to check the documentation for the equivalent class or function.