Anchor: Two scuba divers underwater wearing white shirts and scuba equipment along with fins on their feet.
Entailed: Two people dressed in white shirts and with fins on their feet swim underwater as they haul scuba equipment along.
Contradiction: A chef is preparing food an a large outdoor barbeque grill.
Contradiction: Two people are drowning because they forgot their gear.
Contradiction: Two scuba divers leave their scuba equipment behind and swim underwater without fins and only swim trunks.
Contradiction: Two free divers are swimming with no equipment.
Contradiction: There is two divers sitting on a bench.