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: 'two brown and white dogs are playing frisbee'. Remove all words of length '7' in the given sentence.
two brown and white dogs are

Sentence: 'a giraffe in an inclosure at the zoo'. Remove all words of length '1' in the given sentence.
giraffe in an inclosure at the zoo

Sentence: 'a person sits on a bench as a train passes by'. Remove all words of length '1' in the given sentence.

person sits on bench as train passes by