carbonaceous sulfur hydride
... that the synthetic compound carbonaceous sulfur hydride is the world's first room-temperature superconductor?
... that the synthetic compound <b id="mwBzw"><a href="./Carbonaceous_sulfur_hydride" id="mwBz0" rel="mw:WikiLink" title="Carbonaceous sulfur hydride">carbonaceous sulfur hydride</a></b> is the world's first <a href="./Room-temperature_superconductor" id="mwBz4" rel="mw:WikiLink" title="Room-temperature superconductor">room-temperature superconductor</a>?