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xkcd #3209: Plums
(imgs.xkcd.com)
Title text:
My icebox plum trap easily captured William Carlos Williams. It took much less work than the infinite looping network of diverging paths I had to build in that yellow wood to ensnare Robert Frost.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3209/
Wow, I wasn't cultured enough to get the reference to William Carlos Williams. Frost, yes, of course.
Looking up the poem, I have certainly heard it before.
Oh yes! That's familiar.