Assertion: bottle | /r/HasAspect | a valve mark
Facets:
value: on the base
type: LOCATION
value: typically
type: DEGREE
Source sentences:
text: Be aware that bottles and jars made by early to mid-20th century press-and-blow machines do not usually have ghost seams, since the parison mold was usually one-piece, but will typically have a valve mark on the base (see #6 below).