Task: Question Answering
Input (English): Problem: how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 138 m length ? 
Options: a ) 82.1 sec . , b ) 12.4 sec , c ) 19.1 sec . , d ) 17.1 sec . , e ) 42.1 sec .
Output (English): b