Assertion: african clawed frog | /r/HasProperty | collected in africa
Facets:
value: between 2010
type: TEMPORAL
value: between 1871
type: TEMPORAL
Source sentences:
text: To trace the origins of the infection, Vredenburg swabbed the skin of 178 African clawed frogs collected in Africa between 1871 and 2010 and another 23 collected in California between 2001 and 2010.