In this task, answer 'Yes' if the frequency of the given word in the two sentences is equal, else answer 'No'.

Example Input: Sentence1: 'a airplane that is flying in the sky', Sentence2: 'a big metal clock on the side of a building'. Is the frequency of the word 'a' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a lot of plants and greenery with a train in the background', Sentence2: 'two giraffes are walking through tall grass in open plains'. Is the frequency of the word 'in' in two sentences equal?
Example Output: Yes

Example Input: Sentence1: 'two giraffes stand by a post at a feeding station', Sentence2: 'two women are on the sidewalk near the highway sign'. Is the frequency of the word 'a' in two sentences equal?
Example Output:
No