Task: Question Answering
Input (English): Traveling in opposite directions, buses A and B are passing each other at the relative speed of 25 km/h, while a passenger on bus A walks toward the back of the bus at the speed of 5 km/h. What is the velocity of the passenger on bus A relative to bus B?  
 (A) 20 km/h in the direction of bus A (B) 20 km/h in the direction of bus B (C) 30 km/h in the direction of bus A (D) 30 km/h in the direction of bus B
Output (English): A