Task: Question Answering
Input (English): Problem: the average student age of a certain class which has 45 students is 14 . if one student aged 15 go to another class and the age of the class teacher is included the average changes to 14.66 . what is the age of class teacher ? 
Options: a ) 30 , b ) 35 , c ) 38 , d ) 40 , e ) 45
Output (English): e