Assertion: bacteria's size | /r/HasProperty | reduced to the bottom
Facets:
value: progressively
type: MANNER
value: from the top of the column
type: LOCATION
Source sentences:
text: Each metal section has a perforated base (see Figure N), and the number of perforations is the same in each section, but the size of these perforations is progressively reduced from the top of the column to the bottom.