Anchor: Four cyclists, two male, one female, and one of indeterminate gender, in a bike race in a european country.
Entailed: The cyclists are racing
Contradiction: The woman is iceskating at the park
Contradiction: The kids climb the trees and scream.
Contradiction: A person is holding a guitar in a well-lit area.
Contradiction: The achievement greatly impressed the mathematicians. 
Contradiction: A person in a white helmet is rock climbing.