Task: Question Answering
Input (English): Problem: sum of two numbers prime to each other is 20 and their l . c . m . is 99 . what are the numbers ? 
Options: a ) 8 and 12 , b ) 14 and 6 , c ) 19 and 1 , d ) 11 and 9 , e ) 12 and 9
Output (English): d