Thanks, Malone and Nemo. I can remember when I was at primary school, (yes, my memory is that good), we were given examples of sentences the meaning of which could be changed depending upon how they were punctuated. This was to show us the importance of punctuation. Of course, these days children think punctuation was a type of music that became popular in the 70s. One such example sentence was
John said teacher is a fool
That one has two obvious alternatives. I think we were shown some with 3, or possibly more, different possible choices for the punctuation. What were they? My aforementioned memory is, however, not as good as I thought.