Soyuz TM-21
Soyuz TM-21 was a Soyuz mission , a human spaceflight mission transporting personnel to the Russian space station "Mir" . 
<triplet> Soyuz TM-21 <subj> Soyuz <obj> part of <subj> human spaceflight <obj> instance of <triplet> Soyuz <subj> Soyuz TM-21 <obj> has part