In this task, you need to remove 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: 'an image of a group of people at the park'. Remove all words of length '5' in the given sentence.
an of a of people at the park

Sentence: 'a young man holding a yellow surfboard on top of a grass field'. Remove all words of length '2' in the given sentence.
a young man holding a yellow surfboard top a grass field

Sentence: 'some men standing together while holding tennis rackets'. Remove all words of length '7' in the given sentence.

some men standing together while tennis