But - English Grammar Today - a reference to written and spoken English grammar and usage - Cambridge Dictionary

English Vocabulary about how to tell the time for English Learners - Vocabulario en inglés - como decir la hora

"James while John had had had had had had had had had had had a better effect on the teacher" is an English sentence used to demonstrate lexical ambiguity and the necessity of punctuation,
which serves as a substitute for the intonation,stress, and pauses found in speech.
In human information processing research, the sentence has been used to show how readers depend on punctuation to give sentences meaning, especially in the context of scanning across lines of text. The sentence is sometimes presented as a puzzle, where the solver must add the punctuation.