text: Title: How to build a СNN on BFV?
  Body: Hello!
  I am doing research related to neural networks and homomorphic encryption. Your library is amazing and allows you to explore the TFHE scheme! And as I understand it, the example of the convolutional neural network works with this scheme. However, a question arises, in one of the Issue I saw that you have support for several homomorphic encryption schemes, including the BFV scheme. Therefore, I have a question, how to build a CNN with this scheme?
  If I am wrong and the CNN already works on BFV, is it possible to build it on TFHE?
  
  P.S. (This is about an example docs/advanced_examples/ConvolutionalNeuralNetwork.ipynb)
  