| http://www.w3.org/ns/prov#value | - Both types of cruise activities could be activities which are free for the cruise customers to attend (e.g., free shows onboard the cruise, organized games, demonstrations, or any other suitable free cruise activity) or could be activities which are purchased (e.g., spa appointments, excursions such as snorkeling trips, scuba diving trips, horseback riding trips, or any other suitable cruise activ
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