RELICS: Properties of z {\ensuremath{\geq}} 5.5 Galaxies Inferred from Spitzer and Hubble Imaging, Including A Candidate z {\ensuremath{\sim}} 6.8 Strong [O III] emitter
RELICS: Properties of z {\ensuremath{\geq}} 5.5 Galaxies Inferred from Spitzer and Hubble Imaging, Including A Candidate z {\ensuremath{\sim}} 6.8 Strong [O III] emitter