Assertion: pink tourmaline | /r/HasSubevent | dramatic increase
Facets:
value: in the late nineteenth
type: TEMPORAL
value: in early twentieth
type: TEMPORAL
Source sentences:
text: Tz’u Hsi was especially fond of pink tourmaline, which led to a dramatic increase in mining of the San Diego County pegmatites in the late nineteenth and early twentieth centuries (Fisher, 2002).