Assertion: gas's number | /r/CapableOf | culminate in six-fold increase
Facets:
value: in 2011
type: TEMPORAL
value: over 20th century levels
type: TEMPORAL
Source sentences:
text: Beginning in 2001, the average number of earthquakes occurring per year of magnitude 3 or greater increased significantly, culminating in a six-fold increase in 2011 over 20th century levels.