async function classify(message, language, context = new ConversationContext()) {
  const classification = await this.nlpManager.process(language, message, context);
  return {
    classification,
    context,
  };
}
@description Classify a message.
@param {string} message - The message to classify.
@param {string} language - The language of the message.
@param {object} context - The context of the conversation.
@returns {Promise} - Resolve with the context and the result.
@example
brain.classify('What time is it?', 'en');