In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.

Example Input: it was originally thought that the debris thrown up by the collision filled in the smaller craters.
Example Output: originally , it was thought that smaller craters were filled in with debris from the collision.

Example Input: because of the lack of physical characteristics supporting this group , it is very possible that the subfamily as it is currently recognized is subject to enlargement.
Example Output: because of the lack of physical characteristics supporting this group , it is very possible that the subfamily as it is now recognized is subject to enlargement.

Example Input: because the neck is not externally visible , the head and body appear to merge together.
Example Output:
the neck is not externally visible so the head and body appear to merge together.