<http://schema.org/description>
"It's nice to give eggs away as presents - but it is better to give four rather than six! They come in packs of 20 (not much good if you have rabbits, except maybe at Easter:)"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.omlet.co.uk/shop/chicken_keeping/egg_trays_boxes_and_stamping/189/egg_boxes_-_omlet_-_pack_of_20>