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 ski boarder is airborne on a snow covered slope', Sentence2: 'a sandwich on a plate with a side of cole slaw'. Is the frequency of the word 'a' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a group of giraffes in a closed in environment near a building', Sentence2: 'a boy is riding a scooter under a roof'. Is the frequency of the word 'environment' in two sentences equal?
Example Output: No

Example Input: Sentence1: 'a large brown bull standing behind a metal fence', Sentence2: 'a person holds a ring up to their face'. Is the frequency of the word 'a' in two sentences equal?
Example Output:
Yes