Text: If you're lucky enough to gain entry, you'll see the only major work of art on the whole the Gothic triptych, or altar retable, which is attributed to the artist Rodrigo de Osona from Valencia.
Entailment: Rodrigo de Osona, from Valencia, made a work of art which is now on the Gothic triptych.
Contradiction: No one knows who made the artworks in the Gothic triptych.