Assertion: colt | /r/CapableOf | learn about nitrous oxide
Facets:
Source sentences:
text: He had learned about nitrous oxide (laughing gas) from the factory chemist of his father's textile plant, so he took a portable laboratory on tour and earned a living performing laughing gas demonstrations across the United States and Canada, calling himself as "the Celebrated Dr. Coult of New-York, London and Calcutta".