Anchor: The octagonal construction provides the interior with seven exedrae, or recesses, the eighth being the choir and apse.
Entailed: One of the recesses is a choir and apse.
Contradiction: The construction means there are six exedrae in the interior.
Contradiction: Two girls are sitting on the stairs.
Contradiction: HG was a visitor.
Contradiction: A girl is standing alone.
Contradiction: Some girls are chatting at the train station.