Definition: In this task, you will be given two sentences sentence1 and sentence2. You should decide whether the second sentence is entailed(agreed) by the first sentence. If it does entail, answer "yes", else answer "no".

Positive Example 1 -
Input: sentence1:region is nation in location
sentence2:region is country in location
Output: yes

Positive Example 2 -
Input: sentence1:location is going to war with region sentence1:location is facing  region
Output: yes

Negative Example 1 -
Input: sentence1:award_winner is edging  employer
sentence2:award_winner is winning over employer
Output: Incorrect

Negative Example 2 -
Input: sentence1:award_nominee is finishing in sports.sports_league
sentence2:award_nominee is teaming in sports.sports_league
Output: yes

Now complete the following example -
Input: sentence1:book_author is president of location sentence1:book_author is serving a President of location
Output: 


Output: yes