Task: Paraphrasing
Input (English): Question: Which of the following structures does a frog develop as it changes from a tadpole to an adult frog? 
Answer: lungs. 
Sentence: A frog does develop lungs structures as it changes from a tadpole to an adult frog.
Output (English): A frog doesn't begin to develop its lung until it transforms from a tadpole to an adult.