Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

What is sorry What makes detection by killer T cells more likely?
What makes detection by killer T cells more likely?

What city principal no proper has a population of 1,345,596?
What city proper has a population of 1,345,596?

What do gravitational forces or no type of forces act at very long distances?

What type of forces act at very long distances?