def validate_no_call_to_violence(update: Update, context: CallbackContext):
    query = update.callback_query
    query.answer()

    user = User.by(tg_id=query.from_user.id)

    # try to find a not finished validatoin
    validation = user.get_not_finished_validation()
    if not validation:
        # check if user can validate today
        if not user.can_validate_today:
            query.from_user.send_message(
                s.over_validation_limit, reply_markup=default_markup)
            return ConversationHandler.END

        # check if there are events for validation available
        event = user.pick_event_for_validation()
        if not event:
            query.from_user.send_message(
                s.no_available_events_for_validation, reply_markup=default_markup)
            return ConversationHandler.END

        validation = Validation.create(user, event)

    keyboard = [
        [InlineKeyboardButton(s.yes_danger,
                              callback_data='handle_call_to_violence'),
         InlineKeyboardButton(s.no_safe,
                              callback_data='rate_event_quality')],
    ]

    query.from_user.send_message(validation.event.html_full_description(),
                                 reply_markup=ReplyKeyboardRemove(),
                                 parse_mode=ParseMode.HTML)
    query.from_user.send_message(
        s.call_to_violence_question, reply_markup=InlineKeyboardMarkup(keyboard))
    return REVIEW_CALL_TO_VIOLENCE