Task: Question Answering
Input (English): Problem: a boat goes 100 km downstream in 10 hours , and 75 m upstream in 15 hours . the speed of the stream is ? 
Options: a ) 22 1 / 9 kmph , b ) 22 8 / 2 kmph , c ) 22 1 / 8 kmph , d ) 22 1 / 2 kmph , e ) 22 1 / 4 kmph
Output (English): d