Assertion: lignite | /r/CapableOf | occur by least 1875
Facets:
value: according to gray
type: OTHER
value: to occur in the county
type: PURPOSE
value: for in that year
type: TEMPORAL
Source sentences:
text: Lignite was known to occur in the county by at least 1875 (Mudge, 1875, pp. 124-125) for in that year according to Gray (1875, p. 399) considerable coal had been developed.