What is the question "What are perfect tenses ?" asking about?
A: description

What is the question "What country is Mount Everest in ?" asking about?
A: location

What is the question "What is Nero Wolfe 's favorite drink during office hours ?" asking about?
A: entity

What is the question "What European country is home to the beer-producing city of Budweis ?" asking about?
A:
location