Task: Question Answering
Input (English): Question: The ratio of the number of ladies to gents at a party was 1:4 but when 2 ladies and 2 gents left, the ratio became 1:3. How many people were at the party originally?

 Option A: 18

 Option B: 25

 Option C: 29

 Option D: 20

 Option E: 24
Output (English): Option D