part_of part of part of preceded by preceded by preceded_by simultaneous_with simultaneous with developmentally preceded by developmentally preceded by relation between physical entity and a process or stage existence starts during or after The relations here were created based on work originally by Fabian Neuhaus and David Osumi-Sutherland. The work has not yet been vetted and errors in definitions may have occurred during transcription. Chris Mungall existence_starts_during_or_after existence_starts_during_or_after RO:0002496 uberon x existence starts during or after y if and only if the time point at which x starts is after or equivalent to the time point at which y starts. Formally: x existence starts during or after y iff α (x) >= α (y).