Assertion: blood brain barrier | /r/HasProperty | discovered in late 19th century
Facets:
Source sentences:
text: The blood–brain barrier was discovered in the late 19th century, when the German physician Paul Ehrlich injected a dye into the bloodstream of a mouse.
text: The blood–brain barrier was discovered in the late 19th century, when the German physician Paul Ehrlich injected a dye into the bloodstream of a mouse.