What is the question "Which is the best opening move in chess ?" asking about?
A: entity

What is the question "What ratio of children of ages between two and eleven watch ` The Simpsons ' ?" asking about?
A: numeric

What is the question "Who were the only two bald U.S. Presidents ?" asking about?
A: human

What is the question "What is leukemia ?" asking about?
A:
description