Anchor: They ducked behind a large rock as a dozen more riders roared past silhouetted against the blazing village.
Entailed: It was behind a big rock that they hid as the riders rode past. 
Contradiction: They hid behind the wall as the men rode by on donkeys. 
Contradiction: Two people in silver bicycle helmets walk their bikes down a crowded street.
Contradiction: a person gets a hair cut
Contradiction: A side way for motorcycles in a city.
Contradiction: People playing soccer in front of a crowd.