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: Nana sings a song to Fiona. Fiona smiles at Nana. Fiona claps her hands. Fiona dances in circles. Fiona sings a song to Nana.
 selected sentence: Nana sings a song to Fiona.

Nana visits Fiona >Causes/Enables> Nana sings to Fiona