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: Gina's mom wanted the stray dog Gina brought home out of her house. Gina took the dog to the yard and left him. But he was able to open the gate. She looked for rope to tie him up. But Gina couldn't find anything but a jump rope.
 selected sentence: But he was able to open the gate.

The dog tries to open the gate >Causes/Enables> The dog can open the gate