# How to find list of curated datasets

How does one find a list of all curated datasets in Mathematica? For instance, I was seeking representative reflection spectra of various types of fruit, and searched through the entity foods, but could not find any spectra. I tried natural language input, but failed, not knowing whether my query was wrong or the dataset did not exist. Likewise for atomic spectra and several other possible datasets, such as fine art paintings, automobiles, and so forth. Is there any way besides hunting through EntityValues[]?

I think EntityValue is more or less it, so this is not really an answer. However, I sometimes find fooling around with InputForm and the natural language interface useful. Here is an example.
I give InputForm that the argument the natural language interface returns after I type in the string "art paintings" and I get