Assertion: blackboard | /r/HasProperty | disposed inposition
Facets:
Source sentences:
text: The blackboard E and the cork board ll then are placed in their respective positions; the cork board ll being merely placed against the inner supporting flanges of the inner sheet metal members of the sections of the frame, and the blackboard being placed upon the upper edge of the wooden frame member and pressed slightly against daubs of freshly mixed plastering material or cement which are placed on the wall I l before the blackboard is disposed inposition.