In this task, you need to reverse all words of a given length in the sentence. The number of letters in a word determine its length. For example, the length of the word "apple" is 5.

Sentence: 'a sign explain the meaning of the road work'. Reverse all words of length '7' in the given sentence.
a sign nialpxe the gninaem of the road work

Sentence: 'the tour buses are driving away from the building'. Reverse all words of length '5' in the given sentence.
the tour sesub are driving away from the building

Sentence: 'there are people that are playing frisbee on the field'. Reverse all words of length '7' in the given sentence.

there are people that are gniyalp eebsirf on the field