Assertion: spheroid's cell | /r/CapableOf | aggregate in the bottom of a drop
Facets:
value: spontaneously
type: TEMPORAL
value: after inverting a plate
type: TEMPORAL
Source sentences:
text: The earliest records describe the hanging drop method (see Figure I a,b in Box 1 ), where cells spontaneously aggregate in the bottom of a drop after inverting a plate with drops of cell suspension [].