Anchor: If those subway ads are more effective against the cautious Martins than against the reckless Maxwells, then they are a threat to the hapless Joans.
Entailed: The Joans are at risk if the subway ads have more effect on the Martins than the Maxwells.
Contradiction: The Maxwells are more cautious than the Martins are.
Contradiction: A boy is climbing a tree
Contradiction: Yeah, but I'm a student.
Contradiction: The three children are swimming in the pool.
Contradiction: She's great at finding discounts, but I'm learning how to sew.