Question: A. J. Iversen collaborated with architects and designers to create a style of furniture development in what nation?
Sentence (from "Art Nouveau furniture"): Unlike furniture made by the British Arts and Crafts movement, from which it emerged in stylistic respects, most Art Nouveau furniture was produced in factories by normal manufacturing techniques, which led to tensions with Arts and Crafts figures in England, who criticised continental Art Nouveau furniture for not being "'honestly' constructed.
Relevant evidence: No