Thank you for pointing this out. We will add this tomorrow morning.
This NGA link returns over a thousand pieces by Rothko: https://www.nga.gov/artists/1839-mark-rothko/artworks
The next version can see the image and read the metadata.
A bit more context: We are include everything in the latent space (embeddings) without trying to maintain multiple indexes and hack around things. There is still a huge mountain to climb. But this one seems really promising.
Since this is a semantic search, using a vector embedding, it will handle meanings better than a text search, which would handle names better.