Task: Question Answering
Input (English): Problem: the average age of 19 persons in a office is 15 years . out of these , the average age of 5 of them is 14 years and that of the other 9 persons is 16 years . the age of the 15 th person is ? 
Options: a ) 9 , b ) 71 , c ) 85 , d ) 92 , e ) 90
Output (English): b