Definition: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Input: Passage: The fighting within the town had become extremely intense, becoming a door to door battle of survival. Despite a never-ending attack of Prussian infantry, the soldiers of the 2nd Division kept to their positions. The people of the town of Wissembourg finally surrendered to the Germans. The French troops who did not surrender retreated westward, leaving behind 1,000 dead and wounded and another 1,000 prisoners and all of their remaining ammunition. The final attack by the Prussian troops also cost c.1,000 casualties. The German cavalry then failed to pursue the French and lost touch with them. The attackers had an initial superiority of numbers, a broad deployment which made envelopment highly likely but the effectiveness of French Chassepot rifle-fire inflicted costly repulses on infantry attacks, until the French infantry had been extensively bombarded by the Prussian artillery. Question: How many prisoners did the French leave behind?
Output:
1,000 prisoners