Anchor: The roofs of all the buildings were flat, with loopholed parapets to be manned at need.
Entailed: All of the buildings had flat roofs with loop-holed parapets.
Contradiction: Every building had a steeply-angled roof.
Contradiction: Some girls are diving into a swimming pool.
Contradiction: green flowers in box
Contradiction: Nobody is surfing.
Contradiction: Cairo has a metro line and a river bus service.