Assertion: comet's composition | /r/HasProperty | primitive volatile
Facets:
Source sentences:
text: The team wrote in the research paper published in the journal arXiv: “Comets have a primitive volatile composition that is thought to reflect the conditions present in their formation region in the protosolar disc.
text: Comets have a primitive volatile composition that is thought to reflect the conditions present in their formation region in the protosolar disc,' the researchers wrote in their paper.