def get_host_context(resp_host):
    """
    Prepare host context data as per Demisto's standard.

    :param resp_host: response from host command.
    :return: Dictionary representing the Demisto standard host context.
    """
    return {
        'ID': resp_host.get('id', ''),
        'Hostname': resp_host.get('hostName', ''),
        'IP': resp_host.get('ipAddress', ''),
        'OS': resp_host.get('operatingSystemScanner', {}).get('name', '')
    }