Task: Question Answering
Input (English): Problem: in a rectangular axis system , what is the area of a parallelogram with the coordinates : ( 5,7 ) , ( 12,7 ) , ( 2,3 ) , ( 9,3 ) ? 
Options: a ) 21 , b ) 28 . , c ) 35 . , d ) 49 . , e ) 52 .
Output (English): a