Assertion: marker's use | /r/HasProperty | uncommon
Facets:
value: by 1958
type: TEMPORAL
Source sentences:
text: While using one CD molecule to define populations is uncommon (though a few examples exist), combining markers has allowed for cell types with very specific definitions within the immune system.[citation needed]
text: By 1958, use of felt-tipped markers was commonplace for a variety of applications such as lettering, labeling, and creating posters.