Assertion: nucleus's structure | /r/HasSubevent | its description
Facets:
value: in 1945
type: TEMPORAL
Source sentences:
text: The highly convoluted and labyrinthine structure of the ER led to its description in 1945 as a “lace-like reticulum” by cell biologists Keith Porter, Albert Claude, and Ernest Fullman, who produced the first electron micrograph of a cell.