Anchor: Look out for red flags warning about dangerous undercurrents, and check to see that beaches are patrolled by lifeguards.
Entailed: Undercurrents are dangerous and swimmers should be aware.
Contradiction: Undercurrents are something that swimmers don't need to worry about.
Contradiction: A man and woman are sitting on their porch.
Contradiction: There is a lady sitting outside a Beatles exhibit.
Contradiction: As he didn't really care about security, he randomly chose a spot to settle down.
Contradiction: He seemed to be around forty and he had a sad face.