Look at the last sentence of the first paragraph in your link. Also, look at this other Wikipedia article - https://en.wikipedia.org/wiki/Vegetable. They both say tomatoes are or can be considered vegetables. And like I said before, look up images of the food pyramid on google or even just look up "vegetables" in google images, and you will see tomatoes listed as vegetables. But regardless of the tomato, cucumbers and celery are both vegetables. So congrats on finding something that backs up your tomato claim, but before you go saying that cucumbers are vegetables again, find credible sources.