challenge phases

URI: https://gptkb.org/prop/challenge_phases
4 triples
GPTKB property
Random triples
Subject Object
gptkb:Subterranean_Challenge_2021 field competition
gptkb:Subterranean_Challenge_2021 virtual competition
gptkb:DARPA's_Spectrum_Collaboration_Challenge multiple phases
gptkb:DARPA_Subterranean_Challenge multiple phases