def clean_tweet_text(original_tweet_text):
    """
    Remove all URL and hashtag entities in the tweet_text
    
    param original_tweet_text: the original tweet_text field
    
    return: new tweet_text field with out any URL and hashtag
    """
    tweet_text_words = original_tweet_text.split()
    filtered_tweet_text_words = [tweet_text_word for tweet_text_word in tweet_text_words
                                 if not (tweet_text_word.startswith('http') or tweet_text_word.startswith('#'))]
    
    return ' '.join(filtered_tweet_text_words)