TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What city principal no proper has a population of 1,345,596?

SOLUTION: What city proper has a population of 1,345,596?

PROBLEM: What can er what are the tentacles lined with?

SOLUTION: What are the tentacles lined with?

PROBLEM: What do increased hormone levels cause in aging adults no not that but what becomes more adept at producing vitamin D as a person ages?

SOLUTION:
What becomes more adept at producing vitamin D as a person ages?