Assertion: abacus's bead | /r/HasProperty | moved
Facets:
Source sentences:
text: To subtract numbers, beads are moved back to the edges of the frame.
text: When both beads in the upper deck are moved down, they're reset and a bead on the adjacent rod on the left is moved up as a carry.
text: However, the beads are far too small to be moved using fingers, according to ChinaCulture.org.