before_sent:  The continental shelf around the edge of the oceans is shallower (a few hundred meters or less) and this region is most impacted by human activity.
before_sent_with_intent: <clarity>  The continental shelf around the edge of the oceans is shallower (a few hundred meters or less) and this region is most impacted by human activity.
after_sent:  The continental shelf where the ocean touches land is more shallow (a few hundred meters or less) and this region is most impacted by human activity.