static Category extract(String text) {
        Category result = null;
        text = text.toLowerCase();
        
        if (text.contains("#reliefph")) {
            result = RELIEF;
        }
        else if (text.contains("#rescueph")) {
            result = RESCUE;
        }
        else if (text.contains("#safenow")) {
            result = SAFENOW;
        }
        else if (text.contains("#floodph")) {
            result = FLOOD;
        }
        else if (text.contains("#tracingph")) {
            result = TRACING;
        }
        else if (text.contains("#yolandaph")) {
            result = YOLANDA;
        }
        
        return result;
    }