Task: Question Answering
Input (English): Problem: my grandson is about as many days as my son in weeks , and my grandson is as many months as i am in years . my grandson , my son and i together are 120 years . can you tell me my age in years ? 
Options: a ) 65 , b ) 72 , c ) 44 , d ) 73 , e ) 89
Output (English): b