- Her best season as a hitter was 1998.
- Even the less difficult of the two problems was too hard for Mark.
- Even the slowest of those workers finished ahead of the people in my group.
I think the subject of the first one might be 1998 but I'm not sure, but can a year be the subject? It's a thing so why not?
As for the second and the third one, I'm thinking this might be a case of nominal adjective, but again I'm not sure. I'm thinking the subjects might be " the less difficult " and " the slowest ", because maybe they're adjectives functioning as nouns here. I just want someone to either confirm this or correct me if I'm wrong.