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".

Input: Consider Input: sentence1:employer is disagreeing with book_author sentence1:book_author is challenging  employer 

Output: no


Input: Consider Input: sentence1:region outnumbers  region sentence1:region is behind region 

Output: yes


Input: Consider Input: sentence1:organization_member is bombing  location sentence1:organization_member is launching attack on location 


Output: yes