I've used wikipedia 3.4 Searching for pages in categories to search within Category:James Tiptree Jr. Award-winning works - Wikipedia and also added the keyword fantasy. However this brings up some wrong results.
I note the info box of literary works in Wikipedia contain a genre term (see picture below from here).
I've also tried books that have won otherwise awards - Google Search but don't know how to limit it to fantasy novels.
How can I search for fantasy novels that have won the Otherwise award?