i don’t think the system is really designed to allow you to find all observations, excluding the ones annotated dead – at least not in one step. finding these would require at least 2 queries – one to find all observations with out an alive/dead annotation, and a separate query to find observations with an alive/dead annotation not including dead.
Thank you! I just hadn’t realized you could ask for the alive/dead annotation without specifying “alive” or “dead” at the same time. And this is actually a better search for my purposes than what I was trying to do.