fix; set identifier/pref_label if annotation !nil
fix; set identifier/pref_label if annotation !nil

OpenBEL/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-server,OpenBEL/openbel-api,OpenBEL/openbel-api