private List<String> readContextFromFile(String file) {

        List<String> context = new ArrayList<>();
        try {
            InputStream in = getClass().getClassLoader().getResourceAsStream(file);
            Map<String, ArrayList> input = objectMapper.readValue(in, HashMap.class);

            context = input.get("@context");
        } catch (IOException e) {
            LOGGER.error("Error reading value {}", e.getMessage());
        }
        return context;
    }