Assertion: nitrogen dioxide's gas | /r/AtLocation | ancient minerals
Facets:
Source sentences:
text: Schaller will provide a “ground truth” of gas concentrations in minerals by using a specialized mass spectrometer to measure the amount of gases found in ancient minerals.
text: Schaller will provide a "ground truth" of gas concentrations in minerals by using a specialized mass spectrometer to measure the amount of gases found in ancient minerals.