Task: Question Answering
Input (English): Problem: the distance between 2 cities a and b is 1000 km. a train starts from a at 11 a. m. and travels towards b at 100 km / hr. another starts from b at 12 p. m. and travels towards a at 150 km / hr. at what time do they meet ?
Options: a. 11 am., b. 12 p. m., c. 3 pm., d. 4 p. m., e. 1 p. m.
Output (English): d