<http://schema.org/target>
"https://store.kobobooks.com/search?query={search_term}"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/ebook/california-walnut-industry-commercial-importance-longevity-pollination-varieties-planting-soil-propagation-budding-grafting-pruning-harvesting-enemies-of-the-walnut-and-remedies-area-of-walnut-culture-in-state-in-america-and-in-europe>