Text: Less obvious are the altarpieces in the chapels, the most important element of which (just to the right of the entrance) is a 16th-century polychrome Piet?  by the Valencian Juan de Juni.
Entailment: The most important element of the chapels' altarpieces is a 16th-century polychrome Piet by Juan de Juni.
Contradiction: Valencian Juan de Juni designed alterpieces in the 20th century.