I'm trying to understand the usage of "knew from" in the following quote:
(suddenly cleaning ladies knew from sun-dried tomatoes, suddenly hog farmers knew from creme brulee)
Source: The Corrections
To me (not a native English speaker), this seems ungrammatical. I understand the meaning of phrases like "know a from b", but I'm unable to parse this in any way that makes sense. Does "knew from" has some special meaning here?