In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

Who was one of the few female pharaohs that ruled egypt?
Hatshepsut

Who wrote i look to you by whitney houston?
Robert Sylvester Kelly

What is the purpose of egg wash in baking?

to make pastries shiny and golden or brown in color, and it also is used to help toppings or coatings stick to the surface of the pastry, or to bind pastry parts together

