Assertion: bottle's shape | /r/HasProperty | limited by technique
Facets:
Source sentences:
text: Even a master glassblower (gaffer) was limited in what could be produced free-blown as the shapes were limited by the techniques that could done via the glassblower lungs, movement of the blowpipe, use of a marver (a flat surface) and block (hollowed out surface), and other hand tools (Kendrick 1968).