Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: We lived in the city when we got married in 1981. One day a pigeon sat on an empty flower pot by our fire escape. The pigeon laid two eggs. The eggs hatched and she raised two babies. After a while the three birds flew off.
 selected sentence: The pigeon laid two eggs.

The pigeon mates >Causes/Enables> The pigeon lays eggs