body: //article | //div[contains(@class, 'content-body')]

author: //div[@class="media-body"]/p[@class="details break-word"]
date: substring-before(//span[@class="time"], ' — ')

test_url: https://lifeclub.org/p/happiness
test_url: https://lifeclub.org/books/against-empathy-paul-bloom-review-summary