This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.
--------
Question: not for a second did i see that moving van .

Answer: i did n't see the one truck for a second .

Question: your cat scan came back fine . but your blood pressure 's still a little elevated .

Answer: brain scans did n't show anything , but you still have elevated blood pressure .

Question: having said all that , i would like to now regale you with the story of a most unique species , the maine river crocodile .

Answer:
and after this introduction , i 'd like to introduce you to a unique animal species , maine river crocodile .