Different segments - clarification?

( This is basically a spin-off of the earlier thread: https://getsatisfaction.com/imdb/topics/dancers-in-stage-productions-actors-or-him-herself )

I have another TV-special basically commemorating 150 years of the important events etc. Again, all happens on stage in front of the live audience with some vip guest like the President etc. 

Anyway, the program has some speeches, dance numbers, musical numbers, poem reciting and acting. Every segment has its own on-screen "title" during the program and own cast/crew in the end credits (for example, one person has directed the acting segment, one has adapted a poem for stage, one is a choreographer AND dancer for the dance number, some are actors, some are musicians, etc).

How should I credit the actual segments? Or should the segments be credited in the first place?

Meaning, that for example:

* CAST / Doe, John - - - - - Dancer - - - - - attribute: (segment "The Fly of the Bird")

or

* WRITERS / Doe, Jane - - - - - attribute: (adaption) (segment: "Let Me Recite a Poem to You")

or

* Second Unit Directors or Assistant Directors / Doe, Mike - - - - - occupation: director - - - - - attribute: (segment: "My Actors are Acting")

Thank you.