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.
One example: a georgian inscription around the drum attests his name.
Solution is here: there is a georgian inscription around the drum to confirm his name.
Explanation: The sentences clearly paraphrased correctly and simplified the original sentence which described the Georgian inscription get his name attests which was around the drum.

Now, solve this: more formally , vorticity can be related to the amount of " circulation " or " rotation " -lrb- or more strictly , the local angular rate of rotation -rrb- in a fluid.
Solution:
more officially , vorticity can be connected to the amount of " circulation " of " rotation " , or more precisely , the local angular rate of rotation , in a fluid.