Saab 91 Safir
The Saab 91 Safir ( Swedish for sapphire ) is a three ( 91A , B , B-2 ) or four ( 91C , D ) seater , single engine trainer aircraft . 
<triplet> Saab 91 Safir <subj> trainer <obj> subclass of <subj> aircraft <obj> instance of <triplet> engine <subj> aircraft <obj> part of